Merge "Apply android:attr/dialogCornerRadius to widgets picker dialog top corners" into sc-dev am: 36f9aa7530 am: bcdf855e61 am: 27a806faf1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14643392

Change-Id: I24851c2815cd4439b991d39f6aed5e84a970436b