Merge "Change freeform activity occluding keyguard to fullscreen" into udc-dev...

Merge "Change freeform activity occluding keyguard to fullscreen" into udc-dev am: d48052dd am: c1e825ac am: 108b5ca2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22432975



Change-Id: Ia9f1dc55659f4ee8f7c9ffb8565dc9fae8badef2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>