Use user restriction instead of pin to guard factory reset in Settings.

Bug: 14081992
Change-Id: I60f132312368c5097b46ab97e881eec3700ef586

src/com/android/settings/MasterClearConfirm.java

@@ -24,6 +24,7 @@ import android.app.Fragment;
 import android.content.Intent;
 import android.content.res.Resources;
 import android.os.Bundle;
+import android.os.UserManager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -80,6 +81,10 @@ public class MasterClearConfirm extends Fragment {
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
+        if (UserManager.get(getActivity()).hasUserRestriction(
+                UserManager.DISALLOW_FACTORY_RESET)) {
+            return inflater.inflate(R.layout.master_clear_disallowed_screen, null);
+        }
         mContentView = inflater.inflate(R.layout.master_clear_confirm, null);
         establishFinalConfirmationState();
         return mContentView;