Problems creating Flutter APK on Android after Firebase setup

I am writing an app for Android in Flutter. Initially, when I built the APK, it worked correctly on a device. However, after configuring the app for using the firebase cloud message (mainly in the pubspec.yaml and various source .dart files), it builds an APK that does not work.

when i run flutter doctor this is the output:

[!] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.10.0 Preview 1.0)
    • Visual Studio at C:Program FilesMicrosoft Visual Studio2022Preview
    • Visual Studio Community 2022 version 17.10.34607.79
    • The current Visual Studio installation is a pre-release version. It may not be supported by Flutter yet.
    X Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop development with C++" workload, and include these components:
        MSVC v142 - VS 2019 C++ x64/x86 build tools
         - If there are multiple build tool versions available, install the latest
        C++ CMake tools for Windows
        Windows 10 SDK

...

! Doctor found issues in 1 category.
Process finished with exit code 0

when i try flutter pub get:

Resolving dependencies...
  firebase_messaging 14.7.4 (14.7.19 available)
  http 1.2.0 (1.2.1 available)
  js 0.6.7 (0.7.1 available)
  leak_tracker 10.0.0 (10.0.4 available)
  leak_tracker_flutter_testing 2.0.1 (3.0.3 available)
  leak_tracker_testing 2.0.1 (3.0.1 available)
  material_color_utilities 0.8.0 (0.11.0 available)
  meta 1.11.0 (1.12.0 available)
  test_api 0.6.1 (0.7.0 available)
  vm_service 13.0.0 (14.1.0 available)
  web 0.4.2 (0.5.1 available)
Got dependencies!
11 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.
Process finished with exit code 0`

but when i try `flutter pub outdated` all seems good.

i checked all the files in the android folder and i saw that "GeneratedPluginRegistrant.java", 
"androidappsrcmainAndroidManifest.xml", "MainActivity.kt", "FlutterFirebaseMessagingPlugin.java" cannot resolve a lot of simbols.

tried to clean/repair the dart cache –> nothing

these are the files in my project:

• androidappsrcmainAndroidManifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <application
        android:label="studioc5"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- Specifies an Android theme to apply to this Activity as soon as
                 the Android process has started. This theme is visible to the user
                 while the Flutter UI initializes. After that, this theme continues
                 to determine the Window background behind the Flutter UI. -->
            <meta-data
              android:name="io.flutter.embedding.android.NormalTheme"
              android:resource="@style/NormalTheme"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
    <!-- Required to query activities that can process text, see:
         https://developer.android.com/training/package-visibility?hl=en and
         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.

         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
    <queries>
        <intent>
            <action android:name="android.intent.action.PROCESS_TEXT"/>
            <data android:mimeType="text/plain"/>
        </intent>
    </queries>
</manifest>

• this the "GeneratedPluginRegistrant.java":

package io.flutter.plugins;

import androidx.annotation.Keep;
import androidx.annotation.NonNull;
import io.flutter.Log;

import io.flutter.embedding.engine.FlutterEngine;

/**
 * Generated file. Do not edit.
 * This file is generated by the Flutter tool based on the
 * plugins that support the Android platform.
 */
@Keep
public final class GeneratedPluginRegistrant {
  private static final String TAG = "GeneratedPluginRegistrant";
  public static void registerWith(@NonNull FlutterEngine flutterEngine) {
    try {
      flutterEngine.getPlugins().add(new io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin());
    } catch (Exception e) {
      Log.e(TAG, "Error registering plugin firebase_core, io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin", e);
    }
    try {
      flutterEngine.getPlugins().add(new io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin());
    } catch (Exception e) {
      Log.e(TAG, "Error registering plugin firebase_messaging, io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin", e);
    }
  }
}

• this the "app/build.graddle":

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

android {
    namespace "com.example.studioc5"
    compileSdk flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.studioc5"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {}

• this are the dependencies in the pubspec.yaml:

  cupertino_icons: 1.0.6
  firebase_messaging: 14.7.4
  firebase_core: 2.27.0
  http: 1.2.0
  rounded_expansion_tile: 0.0.13

• this is the main.dart (the *** substitute the real datas):

void main() async {
  await Firebase.initializeApp(
    options: const FirebaseOptions(
      apiKey: '***',
      appId: '***',
      messagingSenderId: '***',
      projectId: '***',
      storageBucket: '***',
    ));
  //   await Firebase.initializeApp(
  //     options: DefaultFirebaseOptions.currentPlatform,
  //
  // );
  runApp(const MyHomePage());
}

• this is the firebase_options.dart:

// File generated by FlutterFire CLI.
// ignore_for_file: lines_longer_than_80_chars, avoid_classes_with_only_static_members
import 'package:firebase_core/firebase_core.dart' show FirebaseOptions;
import 'package:flutter/foundation.dart'
    show defaultTargetPlatform, kIsWeb, TargetPlatform;

/// Default [FirebaseOptions] for use with your Firebase apps.
///
/// Example:
/// dart
/// import 'firebase_options.dart';
/// // ...
/// await Firebase.initializeApp(
///   options: DefaultFirebaseOptions.currentPlatform,
/// );
/// 
class DefaultFirebaseOptions {
  static FirebaseOptions get currentPlatform {
    if (kIsWeb) {
      throw UnsupportedError(
        'DefaultFirebaseOptions have not been configured for web - '
        'you can reconfigure this by running the FlutterFire CLI again.',
      );
    }
    switch (defaultTargetPlatform) {
      case TargetPlatform.android:
        return android;
      case TargetPlatform.iOS:
        return ios;
      case TargetPlatform.macOS:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for macos - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      case TargetPlatform.windows:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for windows - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      case TargetPlatform.linux:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for linux - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      default:
        throw UnsupportedError(
          'DefaultFirebaseOptions are not supported for this platform.',
        );
    }
  }

  static const FirebaseOptions android = FirebaseOptions(***);

  static const FirebaseOptions ios = FirebaseOptions(***);
}

as i said tried to repair/reset the cache, reinstalled android studio, created a new flutter project, tried to manually change the pubspec.yaml dependencies, reinstall the flutter sdk… nothing works.