sheenachhabra 80aac22cf9 Add test file with metadata track
Mp4Muxer supports adding Metadata track.
Added test file to cover this scenario.

PiperOrigin-RevId: 531496409
(cherry picked from commit b3fd202e113949146f6155984665a411164da9e3)
2023-05-17 16:59:54 +00:00
..
2021-10-27 09:12:46 +01:00