AudioService: fix CTS verifier for stream mute

When changing volume, only change the mute state when the
device for which the volume is being changed, is the current
device the stream alias is routed to.

Bug: 264013194
Test: CTS Verifier Ringer Mode Tests
Change-Id: I45e54db86dbfd8a8cbb307e74f7452cf6bbfaf58
1 file changed