Revert "Revert "APM: Avoid route change mute of isolated sounds""

This reverts commit 4a5b48197acdeaa397bf63a753af550bdea1b361.

Reason for revert: original CL not at fault for b/70332110

Change-Id: I3eef8a249305a66111e2f606155511a03b4d588a
2 files changed