Pass track from meta->message and vice versa

CDD requires that the track is the same for compability track and the
actual Dolby Vision track, so we need to pass that back to the app.

Bug: 129367182
Test: CTS
Change-Id: Iab1ad3c4a593923ec6fc4231a4208806bf0159b7
Merged-In: Iab1ad3c4a593923ec6fc4231a4208806bf0159b7