Add fast flag under primary

Fix AUDIO_OUTPUT_FLAG_FAST denied by client due to mismatching sample rate (48000 vs 44100) logcat spam.

Change-Id: I609adf3842d3b0cbcf4fc817693704d4002743dd
Signed-off-by: dr87 <nb00870@gmail.com>
Merge "Add fast flag under primary" into kk4.4