Audio: Add latency mode APIs for HAL V7.1

Add stub implementations of latency mode control APIs for HAL V7.1.

Bug: 187446271
Test: lunch cf_x86_64_phone && m
Change-Id: I387b8db71ec9e5a6969ad77e8402175d6c5d0e8b
(cherry picked from commit b6a0e49f0c051ac440d22a2661e5136a724482a6)
Merged-In: I387b8db71ec9e5a6969ad77e8402175d6c5d0e8b
2 files changed