Reduce duplication in visibility property management

Adds a couple of new methods to manage visibility property instances to
reduce duplication and encapsulate the implementation slightly better.

The AddVisibilityProperty method is exported as it will be needed by
other packages in follow up commits.

Bug: 155295806
Test: m nothing
Change-Id: Ic1a9bb1e151fc6ae65761344fd210b4e4ba74fbc