tree afe5423272b124a6850782ad9a713e0a3002ff3a
parent 980a4856a06eb8d2e2a4e2892143aa27d3f8c33a
author kai <kwangsudo@google.com> 1507762850 -0700
committer kai <kwangsudo@google.com> 1508448076 -0700

AvrcpControllerSM auto play

When get MESSAGE_PROCESS_TRACK_CHANGED, media palyer start playing
automatically and update Metadata.

Bug: 66919606
Test: 1 Pair and connect with an iPhone
      2 Start playing any song
      3 Browse and select another song

Change-Id: Ic2470fed715a50deafd087fff0676ba583c2a514
(cherry picked from commit 4b88ad401e06e898916c23d546592dfc9a860e39)