Add BouncerMessageRepository and BouncerMessageInteractor

Other changes:
 - Rename BouncerLog to BouncerTableLog
 - Make BouncerLog a normal LogBuffer and use it for logging bouncer state.

Test: atest BouncerMessageRepositoryTest
Test: atest BouncerMessageInteractorTest
Bug: 275600559
Change-Id: Ifb505f6dc7ecd3b9385d2c3d58aa5011b6902abf