Check AVRCP volume gain when A2DP connected

Check AVRCP volume gain when A2DP connected

[Model] Renaissance
[BinType] AP
[Customer] ALL

[Issue#] Internal
[Request] N/A
[Occurrence Version] N/A

[Problem] If AVRCP connection is made before A2DP connection,
 the AVC volume gain could not be set because of no transport device.
 To fix the problem, check AVRCP AVC volume when A2DP is connected.
[Cause & Measure] N/A
[Checking Method] N/A

[Team] Bluetooth
[Developer] Sangki Park
[Solution company] Samsung
[Change Type] Specification change

Change-Id: I65dd03a4192fcaec35da3d2a5dad0d62fa4c5f3e