3a4168360b
Adds a new abstraction layer between preference controllers and the AbstractPreferenceController. The layer is used to consolidate the logic for each the setting type for getting and setting values. This will be extended to support UI information for Slices. For reference how this fits into Slices, look at the like-named classes added in this prototype: ag/3221891 The changes in Search are as a transition into deprecation. The code for Search in Settings is out-of-date from the unbundled counterpart, and this change is made so that the current code behaves as normal. Test: robotests Bug: 67996707 Change-Id: Ib1faab706485039edad66119a27a3fd5cabe6009