A2DP Sink: Get audio focus if playback is started from remote

This change gets audio focus when AVRCP Playing state change is
received as PLAYING after connection is intiated from Sink and
music is started from Media Player on A2DP Source.

Change-Id: I0101308abdad6177d9f24503a21417eb3328c6bd
CRs-Fixed: 2074941
1 file changed