Merge "Use ConstraintLayout for theme preview to fix UI break of largest font/display size" into ub-launcher3-master am: aaa81e46f0 am: 444414ffae

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/11596388

Change-Id: I0f474d9c00ec7d257eef3566e0deb486afca81b4