Merge "Add a feature flag for the udfps keyguard view refactor" into udc-dev am: 9dcad8dd am: c3919b99 am: 099767b0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22816858



Change-Id: If0aaaf6f4f79516ce74cf2cdfc24b21c3acbe01f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>