Introduce DeveloperOptionsPreferenceController

 - New abstract class for all preference controllers in developer
 options
 - Used to handle changes in the master switch
 - DeveloperSettingsDashboardFragment has a reference to all preference
 controllers to call "handleMasterSwitchToggled()"

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I64c18f54e22551f025029336880e92ac3a0d4a8c