Merge "Add note about Sensor.TYPE_HEAD_TRACKER visibility" into tm-dev am: 616530de am: edc4e426 am: 778d857c am: cde22dd8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18381200



Change-Id: Ie1d20fece67e7aa7d57e23ce3d5a305e86003379
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>