post_proc: Add support for non-tunnel DSP audio effects

Add hw accelerator module to send PCM data to DSP and get
back the effects processed data.

Expose a wrapper library for AudioFlinger to be able use the new
module to apply the DSP audio effects.

Change-Id: I6ee30c11f04a97b35f12201fb61b8cd901921e68
Signed-off-by: Alexy Joseph <alexyj@codeaurora.org>
17 files changed