Revert "[Media ML] Replace AudioSystem.isActiveStream"

This reverts commit d446b40140f4c6f4b0745c9b63a9d1ec2437f63b.

Reason for revert: b/194046224

Bug: 194046224, Bug: 169386435
Test: build
Change-Id: Ic2877b2dfb6e3f33f6757585166b3c76c1ed3b41
3 files changed