hal: Fix in call music stream muted issue when mic is muted

Fix in-call music stream mute issue when mic is muted within
dialer app. Issue is caused due to mute applied on mixed
voice stream containing both Voice Tx and incall music stream.
Solution is to apply mute on voice device as and when mic is
muted and incall music usecase is active. Mute cannot be
always applied on device as comfort noise can only be applied
after Mute in Voice stream leg

CRs-Fixed:2308665
Change-Id: Ibcb0ef45bbe9a4f906f2016aa70aff2e919eca24