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

This reverts commit d5ccde31a8.

Reason for revert: failure on test cases

Change-Id: I0a179a6ebb5ef1dec566ce6e8facd5f3b82d7c8a

src/com/android/settings/deviceinfo/imei/ImeiInfoPreferenceController.java

@@ -49,7 +49,7 @@ public class ImeiInfoPreferenceController extends BasePreferenceController {
 
     public ImeiInfoPreferenceController(Context context, String key) {
         super(context, key);
-        mTelephonyManager = context.getSystemService(TelephonyManager.class);
+        mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
         mIsMultiSim = mTelephonyManager.getPhoneCount() > 1;
     }