Merge "Spatializer: Add rate based stats" into tm-dev am: be55f493 am: a19424f5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/17749626



Change-Id: Ibe538b9eccab5c1d715c46359f559e2c08c5dc8e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>