getAudioLanguages() {
    return Array.from(shaka.Player.getLanguagesFrom_(this.getVariantTracks()));
  }
Return a list of audio languages available. If the player has not loaded
any content, this will return an empty list.

<br>

This API is deprecated and will be removed in version 5.0, please migrate
to using `getAudioTracks` and `selectAudioTrack`.

@return {!Array<string>}
@deprecated
@export