audio: adjust the latency for output and input

Change the period size to 20 for audio record.
Otherwise it will apply fast capture.
Fast capture timestamps are not supported yet.

Bug: 190453606
Bug: 189793417
Test: Test av sync for camera recording
Test: Test av sync for video playback
Change-Id: Ic7225979a411f6fdef1e5869df7f816bd49003b1
4 files changed