Migrate the rest of AVRCP Controller to use MediaCompat

There are still a few chunks of code in AVRCP Controller that do not use
the MediaCompat library objects. This change gets all AVRCP code to
agree on the compay library, providing a solid base for the cover art
feature.

Bug: b/132812696
Test: Build, Flash, Interopt test with other devices + atest
Change-Id: I62f3acb15ec9ba0ce8c6a6f2fc8a89d193964498