A2DP-Sink: Fix when volume is being change from inactive device

When inactive device is sending the volume change as the part of
SetAbsolute Volume. Accept the volume and later update inactive
device as streaming volume of active device in the form of vol
CHANGED event.

CRs-Fixed: 2430880
Change-Id: I302dad10104a3aaca60288874b0e0323b099e01c
1 file changed