Merge "Add visual feedback on UDFPS enrollment help." into sc-qpr1-dev am: 3ac7cfd386 am: c4f2e10d38 am: 5dd0219d4d

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

Change-Id: I214acf787d48f841eac638a171b927e6d836606a