Settings Fragment Migration (Build pass app)

This patch focused on fixing compile errors and some runtime errors.

Test: We can't test it now. But we will have an integration test later.
Bug: 110259478
Change-Id: I16c471ddcd0fa1460c665b7f74d86fcace5ee67b

src/com/android/settings/ProxySelector.java

@@ -113,7 +113,7 @@ public class ProxySelector extends InstrumentedFragment implements DialogCreatab
             Log.e(TAG, "Old dialog fragment not null!");
         }
         mDialogFragment = new SettingsDialogFragment(this, dialogId);
-        mDialogFragment.show(getActivity().getFragmentManager(), Integer.toString(dialogId));
+        mDialogFragment.show(getActivity().getSupportFragmentManager(), Integer.toString(dialogId));
     }
 
     private void initView(View view) {