stingray: tweak audio processing for new DMA

Audio (I2S) driver changes impacted the buffering scheme of
data in the capture and playback paths.  Add a 10 msec
pad to the start of the VOIP playback to mitigate starvation
during the first handful of RX/TX cycles.

Change-Id: I6d88b9a978a237aa91b3dadd0f53d009fdd6251e
Signed-off-by: Iliyan Malchev <malchev@google.com>
6 files changed