Merge "Log wallpaper target changes events" into tm-qpr-dev am: 1b02a4dc am: 6ba843bd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19125489



Change-Id: I20184a100629ea9bc1d63029badc3afbbb9d53b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>