audiolfinger: implement latency mode control in spatializer mixer am: 6f9534fb

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2208079



Change-Id: I1182c0f497d388e3b9ad12791d3b1c51e64f2f9a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>