Disable settings preferences when the packages do not exist

Bug: 131273934
Test: make RunSettingsRoboTests ROBOTEST_FILTER=SystemNavigationLegacyPreferenceControllerTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=SystemNavigationSwipeUpPreferenceControllerTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=SystemNavigationEdgeToEdgePreferenceControllerTest
Change-Id: I5b12831d0eacbaa9c8b13d7a7b380b8c99f20009
7 files changed