Improve AVRCP quality and state handling (1/2)

Bug: 64749777
Test: Play music with various car kits and see that metadata shows up
      See go/oc-avrcp-sotu - 8/15/20 OC + Patches for further info
Change-Id: Ia9dd450860f5bc54bd249322bfb9762c6235dc32
(cherry picked from commit 6b95520b8fe8a5bd8bc264e06bec51f3591d2507)
3 files changed