Merge "Get PiP round corner radius from WMShell" into sc-dev am: e74e32ab4c am: 2ab5979c29

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14343433

Change-Id: I4b7a671d2c5401c8d8e761e133f0e6b0fde62887