Handle HEADSETHOOK as 'play' in MediaButtonReceiver.onReceive

Issue: #1581

PiperOrigin-RevId: 662515428
(cherry picked from commit c48c051)

RELEASENOTES.md

@@ -33,6 +33,10 @@
  action, as
  [documented](https://developer.android.com/reference/androidx/media3/session/MediaSession#media-key-events-mapping)
  ([#1493](https://github.com/androidx/media/issues/1493)).
+ * Handle `KEYCODE_HEADSETHOOK` as a 'play' command in
+ `MediaButtonReceiver` when deciding whether to ignore it to avoid a
+ `ForegroundServiceDidNotStartInTimeException`
+ ([#1581](https://github.com/google/ExoPlayer/issues/1581)).
 * UI:
 * Downloads:
 * OkHttp Extension:

libraries/session/src/main/java/androidx/media3/session/MediaButtonReceiver.java

@@ -123,7 +123,8 @@ public final void onReceive(Context context, @Nullable Intent intent) {
  KeyEvent keyEvent = checkNotNull(intent.getExtras()).getParcelable(Intent.EXTRA_KEY_EVENT);
  if (keyEvent != null
  && keyEvent.getKeyCode() != KeyEvent.KEYCODE_MEDIA_PLAY
- && keyEvent.getKeyCode() != KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE) {
+ && keyEvent.getKeyCode() != KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE
+ && keyEvent.getKeyCode() != KeyEvent.KEYCODE_HEADSETHOOK) {
  // Starting with Android 8 (API 26), the service must be started immediately in the
  // foreground when being started. Also starting with Android 8, the system sends media
  // button intents to this receiver only when the session is released or not active, meaning