Clean up getters and setters of filters

- In DefaultContactBrowseListFragment, there were 2 ways to
  get filter; now, there's just one - from singeton
  ContactListFilterController.
- In DefaultContactBrowseListFragment and its super class
  ContactBrowseListFragment, there were multiple methods to
  set filter; now, there's just one - from singeton
  ContactListFilterController.

Bug: 30944495

Test: manual - change filter from side nav; switch to custom
               filter; create a contact from an account; list
               event logging (from logcat).

Change-Id: Ic2db8b07880272afd420b747c1ab6aa821311bb4