Merge "Wait for both window and layer to be visible and window to be pinned before considering the app in pip mode" into udc-dev am: 56216f26 am: ef59bc75

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22764140



Change-Id: I081ae625e4d0effabeadabb11b60533550ca05ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>