Merge "Pause region sampling while blurring the shade" into sc-dev am:...

Merge "Pause region sampling while blurring the shade" into sc-dev am: eb87d4ea am: 57b159c9 am: 0c5af67b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15128775

Change-Id: If4b5af916249932551c526f2342df76260a1c704