How to handle device fold postures using the emulator in android studio

I’m trying to apply the Jetpack WindowManager library’s WindowLayoutInfo class, which provides information about foldable displays (flat, half_opened, etc), im following the codelab for adaptative uis (url 01), in android studio, i created an instance of the emulator for a resizable device (this is experimental feature of last stable ide), but, when testing the app, the foldable states are the normal ones, checking the following function, it always returning the default posture (Normal):

I need some ideas for configuring the emulator for this feature. While unit testing is ok, the testing in the ui isnt checking the foldable state.

Thanks in advance.

Url 01: https://developer.android.com/codelabs/android-window-manager-dual-screen-foldables?hl=es-419#5

—
Kotlin code:

sealed interface DevicePosture {
  object NormalPosture : DevicePosture

  data class BookPosture(
    val hingePosition: Rect
  ) : DevicePosture

  data class Separating(
    val hingePosition: Rect, var orientation: FoldingFeature.Orientation
  ) : DevicePosture
}

@OptIn(ExperimentalContracts::class)
fun isBookPosture(foldFeature: FoldingFeature?): Boolean {
  contract { returns(true) implies (foldFeature != null) }
  return foldFeature?.state == FoldingFeature.State.HALF_OPENED && foldFeature.orientation == FoldingFeature.Orientation.VERTICAL
}

@OptIn(ExperimentalContracts::class)
fun isSeparating(foldFeature: FoldingFeature?): Boolean {
  contract { returns(true) implies (foldFeature != null) }
  return foldFeature?.state == FoldingFeature.State.FLAT && foldFeature.isSeparating
}

/* ... */
val devicePostureFlow = WindowInfoTracker.getOrCreate(this).windowLayoutInfo(this)
  .flowWithLifecycle(this.lifecycle)
  .map { layoutInfo ->
    val foldingFeature = layoutInfo.displayFeatures.filterIsInstance().firstOrNull()
    when {
      isBookPosture(foldingFeature) -> DevicePosture.BookPosture(foldingFeature.bounds)
      isSeparating(foldingFeature) -> DevicePosture.Separating(foldingFeature.bounds, foldingFeature.orientation)
      else -> DevicePosture.NormalPosture
    }
  }
  .stateIn(
    scope = lifecycleScope,
    started = SharingStarted.Eagerly,
    initialValue = DevicePosture.NormalPosture
  )

—
I’m also following this tutorial from web:
Large Screens & Foldables Tutorial for Android