Audio : Add remote submix stream implementation

Bug: 286914845
Test: atest VtsHalAudioCoreTargetTest
Merged-In: Ia477458193ade9068eaf56e953ab670fee53cc7d
Change-Id: Ia477458193ade9068eaf56e953ab670fee53cc7d
(cherry picked from commit 6bb696370b98eceac207c5f51ca4f98b2efb624a)
11 files changed