When un-unifying the personal and work locks, launch lock setup

When the user decides to have a separate work lock, it makes sense
to send them to set up that lock directly. Also fixes the issue where
we have work fingerprints in a unified state and un-unifying leaves
the work profile with no lock but fingerprints.

Bug: 27199237
Change-Id: I85dab9cdf993af69a661d8f0cd4ad2449a348cac