setup method
Method to setup the AudioTrack event listeners on a TextTrack list (AudioTracks).
Implementation
void setup(AudioTracks trackListToWrap) {
_wrappedTrackList = trackListToWrap;
innerList = trackListToWrap;
_wrappedTrackList?.addEventListener(AudioTracksEventTypes.ADDTRACK, forwardingkEventListener);
_wrappedTrackList?.addEventListener(AudioTracksEventTypes.REMOVETRACK, forwardingkEventListener);
_wrappedTrackList?.addEventListener(AudioTracksEventTypes.CHANGE, forwardingkEventListener);
}