Add r_submix to goldfish audio

r_submix is required by CDD.

Bug: 159945428
Test: g3-app-compat
Signed-off-by: Roman Kiryanov <rkir@google.com>
Change-Id: Ib22681ef11b1d48f9f92d7f1d0a5ed1622a0ccea
Merged-In: Ib22681ef11b1d48f9f92d7f1d0a5ed1622a0ccea
4 files changed