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

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

Change-Id: I62e02dd0ac46319ac31ad89249c2e74f0436c750
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>