resume method
Resume the current playback.
An exception is thrown if the player is not in the "paused" state.
Example:
await myPlayer.resumePlayer();
Implementation
Future<void> resume() async {
_logger.d('FS:---> resumePlayer');
await _lock.synchronized(() async {
await _resumePlayer();
});
_logger.d('FS:<--- resumePlayer');
}