Merge "Shows blurred thumbnail before fading to live preview" into tm-qpr-dev...

Merge "Shows blurred thumbnail before fading to live preview" into tm-qpr-dev am: 31d25c7b am: 2996ad8b am: 69b2a5d6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/22338419



Change-Id: If6d79adda72b4423e8e3f61a39c7f66186135070
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>