Fix deadlock between MediaSessionService and MediaSessionRecord

Bug: 335454915
Test: atest CtsMediaBetterTogetherTestCases
Test: atest cts/tests/app/src/android/app/cts/ActivityManagerFgsDelegateTest.java
Flag: com.android.media.flags.enable_notifying_activity_manager_with_media_session_status_change
Change-Id: I4160e62184fafe2508b904e35a1adf10e96d4d23
2 files changed