Merge "Limit biometric enrollments when Unicorn account is present." into sc-dev am: 12e161d1dc am: cd50557c3f

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

Change-Id: Idb9a72ae857be801a8f74fe75da0d2d91b09c171