Merge "Rename Preview2 to Preview (2/3)" into udc-qpr-dev am: 10dae39f4e am: b71bc988a5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24551243

Change-Id: Ie1f9de5478ddaae99cbb88043bdc4cfb5427e5d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>