Move the AAH RTP code out of framework and into vendor.

Relocate the AAH RTP code from framework/av into
vendor/google_devices/phantasm.  This change is the deletion, there
will be a separate CL which re-introduces on the vendor side of
things.

Change-Id: Ibe7e6d4b633a3886b87a615691a2692f2382af6c
Signed-off-by: John Grossman <johngro@google.com>