Performs an optional default action.

For the case of an action provider placed in a menu item not shown as an action this method is invoked if previous callbacks for processing menu selection has handled the event.

A menu item selection is processed in the following order:

• Receiving a call to IMenuItemOnMenuItemClickListener.OnMenuItemClick(IMenuItem).
• Receiving a call to Android.App.Activity.OnOptionsItemSelected(IMenuItem)
• Receiving a call to Android.App.Fragment.OnOptionsItemSelected(IMenuItem)
• Launching the Android.Content.Intent set via IMenuItem.SetIntent(Android.Content.Intent)
• Invoking this method.

The default implementation does not perform any action and returns false.

[Android Documentation]