Merge "Fix ATMS#focusTopTask set to PiP task even the activity is not...

Merge "Fix ATMS#focusTopTask set to PiP task even the activity is not focusable" into udc-dev am: e10f63b4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23493105



Change-Id: I3d4c386d858555c7684b0369c0f47e5eaa0c3992
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>