Fix refactoring typo

Seems like when we renamed/rearranged the methods we didn't ignore
mPolicyVisibility..and that's the most important part!

Fixes a bug where the dock divider isn't animating when unlocking
the phone.

Bug: 36200726
Change-Id: I4c5e9ca7f1b6e7bf21f793e1cf39d92fe77489e8