Merge "Move PreviewFragment2 to WPP2 (2/3)" into udc-qpr-dev am: ac6d8cf3 am: 5aeca076

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24358940



Change-Id: Ia6b5e621eb181167c96e20c618db706eb1fed3c8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>