Merge "Add flags to enable QS clipping / Scrim transparency." into tm-qpr-dev am: a122bd8f

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



Change-Id: I534603a66e9596b623add61842239c12aba0f6c1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>