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/ChangeWifiStateDetails.java

@@ -49,7 +49,7 @@ public class ChangeWifiStateDetails extends AppInfoWithHeader
         super.onCreate(savedInstanceState);
         final Context context = getActivity();
         mAppBridge = new AppStateChangeWifiStateBridge(context, mState, null);
-        mAppOpsManager = context.getSystemService(AppOpsManager.class);
+        mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
 
         // find preferences
         addPreferencesFromResource(R.xml.change_wifi_state_details);