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: 10a419fb am: 3164f9a3

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



Change-Id: If6ac5d2c26793c321ff70b4bb80512259a37e0f1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>