Fix Wifi & Bluetooth slice can't show on search result

root cause: we remove wifi & bluetooth preference screen key from search
indexing, this cause these 2 special slices can't map to correct key

solution: rename preference key for mapping

Bug: 149366072
Test: robotest & manual
Change-Id: Id424e63c4f97ccd6f58a80aaa414807774159512

src/com/android/settings/network/NetworkDashboardFragment.java

@@ -150,13 +150,5 @@ public class NetworkDashboardFragment extends DashboardFragment implements
                             null /* metricsFeatureProvider */, null /* fragment */,
                             null /* mobilePlanHost */);
                 }
-
-                @Override
-                public List<String> getNonIndexableKeys(Context context) {
-                    List<String> keys = super.getNonIndexableKeys(context);
-                    // Remove master switch as a result
-                    keys.add(WifiMasterSwitchPreferenceController.KEY_TOGGLE_WIFI);
-                    return keys;
-                }
             };
 }