`PlaybackStateCompat.toKeyCode(command)` was replaced by our
own implementation of `toKeyCode()`. The legacy implementation used PLAY and PAUSE, while the new implementation uses PLAY_PAUSE. This made `pause` a pending intent that attempt to start the service in the foreground, but `service.startForeground()` won't be called in `MediaNotificationManager.updateNotificationInternal` when paused.
PiperOrigin-RevId: 476895752
