Merge "Gates blur code behind BlurUtils#supportsBlursOnWindows." into ub-launcher3-rvc-dev am: 8555146d9a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/11812122

Change-Id: I81f464584141ad192e95cc33f6e7f51da59d45d7