AVRCP: Accept volume change when A2dp is not connected

When A2DP is not connected and AVRCP is connected first
then accepting volume change from AVRCP connected device.

when device is added in blacklist then keeping volume
change to maintain proper sync with streaming volume
for active device.

From AVRCP active device will upadte after connection
is suceesfull.

CRs-Fixed: 2329112
Change-Id: I00b8494b1e5f7ec2f9f750a9c9c123f396b3181b
1 file changed