Merge "Defer remove splash screen window if it is inTransition." into udc-dev am: 778e47bb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22494388



Change-Id: Ic88579769de1fb708508533592f454fe5a8811df
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>