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: f5ce29e7

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

Change-Id: If857335a81960d5821f71176e22e2bc5fd822b01