Merge "Limit biometric enrollments when Unicorn account is present." into sc-dev am: 12e161d1dc am: 21ef1830ea am: 6cab6458d6

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

Change-Id: If0687c468eb91a1a3d78bb2d4283d35b45016850