Check getLastCustomNonConfigurationInstance() works well

- make sure that StorageWizardFormatProgress runs smoothly.
- confirm that mTask has the same object id when changing the screen
orientation.

Bug: 111151113
Test: manual
Change-Id: I730c1b0f08e8a20a1aafa668fb02cd5a09fdd70a

src/com/android/settings/deviceinfo/StorageWizardFormatProgress.java

@@ -59,7 +59,6 @@ public class StorageWizardFormatProgress extends StorageWizardBase {
         setHeaderText(R.string.storage_wizard_format_progress_title, getDiskShortDescription());
         setBodyText(R.string.storage_wizard_format_progress_body, getDiskDescription());
 
-        // TODO (b/111151113) : Need to check it again.
         mTask = (PartitionTask) getLastCustomNonConfigurationInstance();
         if (mTask == null) {
             mTask = new PartitionTask();
@@ -69,7 +68,7 @@ public class StorageWizardFormatProgress extends StorageWizardBase {
             mTask.setActivity(this);
         }
     }
-    // TODO (b/111151113) : Need to check it again.
+
     @Override
     public Object onRetainCustomNonConfigurationInstance() {
         return mTask;