Improve audio logs and dumpsys media.audio_flinger

Include mFrameCount in shared memory corrupt error log.

Fix typo in log for primary audio interface.

Include the new server frame count in logs for fast tracks.

Always log when fast is successful for output tracks, as it helpful
  (was already there for input).

Cleanup dumpsys for threads.

Test: builds OK, and logs contain more information
Change-Id: I2b5b4d700e8eb7c261a3125fb03ddc00bf08537e