Batch zen audio restrictions across usages

Migrate Zen audio restrictions to new API which batches across usages.

New applyRestriction logic partitions usages across those which should
be muted, and those which shouldn't be, with a single appops call for
each (both directions are needed since the restriction state is never
implicitly cleared).

Modify mocking tests to handle the refactored call, additionally
verifying the restriction state across all usages in the process. In
doing so, a few redundant tests can be eliminated.

Test: atest ZenModeHelperTest
Flag: EXEMPT mechanical refactor
Bug: 415378815
Change-Id: I5c8435fcff1a90bb61d0dbfad8a35cb54cf76d40