Merge "Add visual feedback on UDFPS enrollment help." into sc-qpr1-dev am: 3ac7cfd386 am: 6764f675f1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15676724

Change-Id: Id62c557741bead2e35746f93a1500c8cc67322a7