End-to-end Robolectric playback test for audio capabilities

This change adds end-to-end Robolectric playback tests which handle
the scenario the player is playing audio via passthrough and
AudioTrack raises the ERROR_DEAD_OBJECT error upon which the player
attempts to recover by switching to another audio format.

PiperOrigin-RevId: 531180183

library/core/src/main/java/com/google/android/exoplayer2/audio/AudioCapabilities.java

@@ -32,6 +32,7 @@ import android.util.Pair;
 import androidx.annotation.DoNotInline;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
+import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.util.MimeTypes;
@@ -46,7 +47,7 @@ import java.util.Arrays;
 public final class AudioCapabilities {
 
   private static final int DEFAULT_MAX_CHANNEL_COUNT = 8;
-  private static final int DEFAULT_SAMPLE_RATE_HZ = 48_000;
+  @VisibleForTesting /* package */ static final int DEFAULT_SAMPLE_RATE_HZ = 48_000;
 
   /** The minimum audio capabilities supported by all devices. */
   public static final AudioCapabilities DEFAULT_AUDIO_CAPABILITIES =