AvrcpControllerSM update PlayerList

Update the PlayerList when we got Track_Changed.

Bug: 67604427
Test: 1 Pair phone with Mojave, play music from Google Play Music
        check the music app name
      2 Streaming music from other Music apps, open drawer check
        music app name

Change-Id: I657fe88f73dd85598a9e51147ff6eed9f151cbdf
(cherry picked from commit 30cd7c70a5ed9059a72a390111cc8719a285df36)