Unmute the streaming as the last step of changing active device

When notified the audio framework about the new active device, we unmute
the streaming which was muted by ourself.

Bug: 132416679
Test: TH
Change-Id: I401a3f3583a1b81eef21989d7176de6ac2b7a7d1
(cherry picked from commit 838128b3bbb61d720a0bfa2b81547b46d5f75192)
1 file changed