Repeat music playback

[skmaiti2050]

Also now song is on repeat when the song has ended and the time in the notification shows the additional time of music being played, for example:

Steps of reproduction:

1. Play a song, for example: 3 min length
2. After the song has ended, it's on repeat.
3. The notification shows time of the total playback, example the same song has played twice, so the notification shows 6+ mins and it's never ending unless stopped from notification or in the app player.

I would like to suggest to add repeat toggle in the music player UI, where user can turn it on or off

google/ExoPlayer#2899

https://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer2/Player.RepeatMode.html

https://medium.com/google-exoplayer/repeat-modes-in-exoplayer-19dd85f036d3