Working Live Channels audio track switching sample

WorkingSimpleSessionImpl

public class WorkingSimpleSessionImpl extends TvInputService.Session {
	// ...

	private void setAudioTracks() {
		List<TvTrackInfo> trackInfoList = new ArrayList<>();
		for (int i = 0; i < audioTrackCount; i++) {
			MediaFormat format = player.getTrackFormat(DemoPlayer.TYPE_AUDIO, i);
		    	TvTrackInfo trackInfo = new TvTrackInfo
		        	.Builder(TvTrackInfo.TYPE_AUDIO, String.valueOf(i))
		        	.build()

		    	trackInfoList.add(trackInfo);
		}
		notifyTracksChanged(trackInfoList);
	}

	@Override
	public boolean onSelectTrack(int type, String trackId) {
		Log.d(TAG, String.format("onSelectTrack(%d,%s)", type, trackId));
		
		// ...
	}
}