Merge "Add metrics for foreground download wallpaper effect readiness." into udc-qpr-dev am: 74f51f242d am: 6bebe92419

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24383120

Change-Id: I67e08747c0576b07043defa4299bcaf87dbee05c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>