Merge "Add Null check for mView.findFocus() in ViewRootImpl" into rvc-qpr-dev am: 29c2b7e6e3 am: 344f4d7107

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13127785

Change-Id: Idaa2b9d07f59cbe0c7a3416a3ebddec0316c301d