tonihei d53d51d57c Add optional id to TrackGroup.
This allows to give TrackGroups an identifier. The underlying goal is
to provide a way to make otherwise identical TrackGroups
distinguishable.

Also set this id in all internal sources that may produce identical
TrackGroups in certain edge cases.

Issue: google/ExoPlayer#9718
PiperOrigin-RevId: 413430719
2021-12-02 15:21:33 +00:00
..
2021-12-02 15:21:33 +00:00
2021-12-02 15:21:33 +00:00