Merge "Force relayout when wallpaper engine become visible." into rvc-dev am:...

Merge "Force relayout when wallpaper engine become visible." into rvc-dev am: ec30716a am: 8577b212 am: 743359ff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11863063

Change-Id: I8f036f7f6cfa1c81a4273b3bf16e5e5782b9a5f0