Merge "Tune stillness detector for more responsive headtracking" into tm-qpr-dev am: 65002514

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/19754594



Change-Id: I1d5e7232aae1ff238f12a42f2e0208dfd2eb483e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>