Audio player delayed start: don't throw exception

When the framework sets a delayed start on a PlayerBase instance
  (e.g. MediaPlayer or AudioTrack), catch the IllegalStateException
  that can be thrown if the player's state has changed by the time
  the actual start command gets executed.

Test: generate notifications played by NotificationPlayer
Bug 35019197

Change-Id: I51fd0305bc83b34e33fbcf9331f55627d32702f3