alsa_sound: Add e2e multi-channel support on 8974.

Add support for playing multi-channel content over HDMI
if HDMI sink supports multi-channel.
Get HDMI EDID from driver for Multichannel playback
Set desired channel map for multi channel output

Change-Id: I561c876af224b9a376d260d3fd14fa0cfa2a64b3
CRs-Fixed: 433019
9 files changed
tree: 28abf773d51184ab4fa664cfe96c3f242ef699b0
  1. alsa_sound/
  2. audiod/
  3. libalsa-intf/
  4. mm-audio/
  5. Android.mk