Merge "Sensitive Notification Reveal Animation Preparations" into tm-qpr-dev am: f382bb46 am: 34899502 am: c3772783 am: b241b327

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21298419



Change-Id: Ib13e457212254b310c7169874813ab632a4bc3b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>