Merge "Only setup widget adapters once after inflation" into sc-dev am: 45b8e48a69 am: d6844f8c9a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14213286

Change-Id: I0d62548771658e6676004ab99c3da348b763822c