function resumeTrack() {
	if (current_track_id !== null) {
		audioTracks[current_track_id].play();
	}
}
resume the previously paused audio track
@example
// play an awesome music
me.audio.playTrack("awesome_music");
// pause the audio track
me.audio.pauseTrack();
// resume the music
me.audio.resumeTrack();