AVRCP : volume handling in multiple scenario

1. Storing volume during SHO and BT ON/OFF.
2. Stored volume will deleted when device
   is unpaired from list dring BT ON/OFF.
3. For first time connection if volume is not
   stored, then stream volume will use as
   mLocalVolume.
4. If AVRCP is connected after a2dp and remote
   volume is different then local volume then
   setAbsolute volume will send.

CRs-Fixed: 2320543
Change-Id: I0babb75a382b780a82b6408e0aa9928c6f45cdda
1 file changed