Move binder calls to the background threads

Flag: EXEMPT bugfix
Fixes: 374461680
Test: atest MediaOutputInteractorTest
Test: atest CaptioningRepositoryTest
Test: atest CaptioningInteractorTest
Test: manual on foldable
Change-Id: I5c14fef446a19fd5583f1a893ab933c676c175c9
9 files changed