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: bb1835a5

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



Change-Id: I6768c7416e635305b237c544353f4af7b4b868ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>