Add Lyrics support but not happy for merge

[neoedmund]

I made the just work patch for adding lyrics function for audio.

But I'm sorry about the "dirty" code, so It will not be merged to the original repo. But anyone need the lyrics is welcome to download the apk from the release section of this repo.

support .lrc external lyrics
support for remember play position for each audio is not work (why?)
small issue like lyrics not shown when pause is pressed

Thanks

[PomepuyN]

Thanks a lot for your pull request! It would be an interesting addition to the app.

Unfortunately, this repository is only a mirror and all request should be done on https://code.videolan.org/videolan/vlc-android/-/merge_requests

Could you please open it there? If you need any help to migrate this request to our Gitlab, please let me know.