Controller generates the injection location settings
in updateState() which happens in onResume.
That's the primary reason why we observed the shifting issue.
In a good practice, we generate preference in displayPreference(),
and then update the setting state in updateState().
In this cl, we create a base controller class to encapsulate
most implementation, and developer need to inject location
services in child class.
Test: Add work profile, and see correct services list.
Bug: 183169265
Change-Id: I5735ba974da87ad83b56791abd8a8637c2317571
