Merge "Cancels dual display state when all activities for process are...

Merge "Cancels dual display state when all activities for process are invisible" into udc-qpr-dev am: dad5d449

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24793061



Change-Id: I40391fe521b5403e1c767745f88227003cf1881a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>