Merge "Measure WidgetsBottomPicker again when the number of spans changes" into sc-dev am: 6604eb54bf am: 55bdce183e am: fac119da49

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15095550

Change-Id: Ibe4b8854d29fe81539942a6773613bf43774357d