Merge "Large screens: fully fade in behind scrim before anything else on...

Merge "Large screens: fully fade in behind scrim before anything else on shade" into tm-qpr-dev am: 14fdb4b9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21020973



Change-Id: Ib68c5d6c8b843564185fa31ea04a99f8f98c7851
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>