Audio: Remove unnecessary unmute when A2dp device disconnects.

It will cause the audio leak if stream unmutes when Bt-A2dp
disconnect event is received, which will be done in the routing
to non-a2dp device.

Remove unnecessary unmute action when A2dp device disconnects.

CRs-Fixed: 2533905
Change-Id: I74207d13c763a7c0ff5f95bbd90c8ac7b0d61562
1 file changed