LibAAH_RTP: Add support for AAC in MP4.

Cherry picked from Ie8298eb9d253fc6ede448da87660a60d23170987 and
conflicts fixed by hand.

Change-Id: I6f0a59357ba1a3d57caf67d2eb0ade7486723e7b
Signed-off-by: John Grossman <johngro@google.com>
10 files changed