VpnSettings: do not copy unsaved fields.

Bug: 5554228
Change-Id: I1f1d6d89f99c728e48e2abe00920a1f36bd53576

src/com/android/settings/vpn2/VpnDialog.java

@@ -100,8 +100,10 @@ class VpnDialog extends AlertDialog implements TextWatcher,
         mName.setText(mProfile.name);
         mType.setSelection(mProfile.type);
         mServer.setText(mProfile.server);
+        if (mProfile.saveLogin) {
             mUsername.setText(mProfile.username);
             mPassword.setText(mProfile.password);
+        }
         mSearchDomains.setText(mProfile.searchDomains);
         mDnsServers.setText(mProfile.dnsServers);
         mRoutes.setText(mProfile.routes);