Merge "Limit biometric enrollments when Unicorn account is present." into sc-dev am: 12e161d1dc am: 769447a502 am: 24a3796f7c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/15413152

Change-Id: I189313c9eaf6d05fa5b06872f1b8c51056094255