Concurrent playback behavior when bit-perfect client is active.

1. Mute system sound on bit-perfect output thread. System sound such as
   touch sound can be triggered often. To provide better bit-perfect
   playback experience, mute system sound on bit-perfect output thread.
2. Mute bit-perfect track when there are other clients playing. When
   there are other clients, such as notification, playing, the
   bit-perfect client can no longer be played bit-perfectly. As the
   bit-perfect client can turn out to be noise if it cannot be played
   bit-perfectly, mute bit-perfect client when there are other clients
   playing.
3. Do not allow creating bit-perfect client if there is any other high
   priority use case, such as ringtone, alarm, active. The reason is
   that the high priority clients will always take the audio focus for
   the playback and there is no need for those clients to be played over
   bit-perfect path.

Bug: 339515899
Test: atest audiopolicy_tests
Test: Manually
Change-Id: I8483d08085fd4076fa64ed4de278e45e6f6c0af0