Guard against callbacks when no list view created

Bug: 21762925
Change-Id: If4bdaa6cf107c4b890a8ebeb56ba4ef222a340ad

src/com/android/settings/wifi/WifiSettingsForSetupWizard.java

@@ -148,7 +148,7 @@ public class WifiSettingsForSetupWizard extends WifiSettings {
     }
 
     protected void updateFooter(boolean isEmpty) {
-        if (isEmpty != mListLastEmpty) {
+        if (isEmpty != mListLastEmpty && hasListView()) {
             final ListView list = getListView();
             list.removeFooterView(mEmptyFooter);
             list.removeFooterView(mAddOtherNetworkItem);