Turn on the new connected device page by default

Bug: 69926683
Test: RunSettingsRoboTests
Change-Id: Ice589b825226e92eace5f5fa6b58499a13e36ef8

src/com/android/settings/connecteddevice/AdvancedConnectedDeviceDashboardFragment.java

@@ -67,12 +67,6 @@ public class AdvancedConnectedDeviceDashboardFragment extends DashboardFragment
         return R.xml.connected_devices_advanced;
     }
 
-    @Override
-    public String getCategoryKey() {
-        //TODO(b/69926683): remove this method and change DashboardFragmentRegistry directly for P
-        return CategoryKey.CATEGORY_DEVICE;
-    }
-
     @Override
     protected List<AbstractPreferenceController> getPreferenceControllers(Context context) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();