Merge "Add flags to enable QS clipping / Scrim transparency." into tm-qpr-dev am: a122bd8f40 am: ba24c2e656

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19958444

Change-Id: I5f1457c76e9376484f0cacb3d4e5edcb079c324c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>