Merge "Scroll to the selected widget picker row after headers are clicked" into sc-dev am: f15214597e am: 9753e04102 am: c4c42616c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14800533

Change-Id: I325d35ca637310070c1c38af27cd463b9d26f037