Merge "Define flag for wallpaper preview loading animation (2/3)" into...

Merge "Define flag for wallpaper preview loading animation (2/3)" into udc-qpr-dev am: c0f9ab57 am: 9c3ed6e6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24042327



Change-Id: I7bffcefa4ee09afba8de141bdf815f008d1d4c88
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>