35b8ab411d
This avoids having to add AnalyticsListener and catching the `onPlayerReleased` callback. The `Exoplayer.release()` method is blocking and one can be sure that the player is released if the call returned. However, the method is useful for UI testing and asserting that the player is released after a certain UI action, e.g. closing the activity or detaching a window. PiperOrigin-RevId: 640114416