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

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



Change-Id: I7a3894e1d768d8b77ffd0029b51faf561eb673f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>