Merge "Add a feature flag for the udfps keyguard view refactor" into udc-dev...

Merge "Add a feature flag for the udfps keyguard view refactor" into udc-dev am: 9dcad8dd am: 5e816261 am: 1d85f56d

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



Change-Id: I14ee87510a838ea263041c056d8a5f23ec4331a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>