am b357a77d: alsa_sound: Add hdmi audio sink capability discovery

* commit 'b357a77dc9c72cb6e327e945421f440052233b51':
  alsa_sound: Add hdmi audio sink capability discovery
tree: 76dbfe1eeffbe61b2f4af8738637450bb515fb6c
  1. alsa_sound/
  2. libalsa-intf/
  3. Android.mk