Revert "[Settings] Convert to getSystemService(Class<T>)"

Revert submission 1645152-getSystemService(Class<T>)

Reason for revert: Fix JUnit test failure
Reverted Changes:
I1b4812044:[Settings] Convert to getSystemService(Class<T>)
I278951c24:[Settings] Support getSystemService(Class<T>)

Change-Id: I864a40f82ba9cb4170900ac0c1d77f781b17341f

src/com/android/settings/wifi/p2p/WifiP2pPreferenceController.java

@@ -71,7 +71,7 @@ public class WifiP2pPreferenceController extends AbstractPreferenceController
         super(context);
         mWifiManager = wifiManager;
         lifecycle.addObserver(this);
-        mLocationManager = context.getSystemService(LocationManager.class);
+        mLocationManager = (LocationManager) context.getSystemService(Service.LOCATION_SERVICE);
     }
 
     @Override