Merge "Fix "Preview for grid goes missing after turning off and back on the...

Merge "Fix "Preview for grid goes missing after turning off and back on the screen"" into ub-launcher3-master am: 6d4cde2a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/11338717

Change-Id: Id60c41937dbeacde814aaba16ab13b25309a1e3a