IconicsMenuInflaterUtil not working with Submenus
Hi,

I found that the IconicsMenuInflaterUtil doens't work when the menu has subitems like this:
```
<menu>
    <item>
        <menu>
            <item/>
            <item/>
        </menu>
    </item>
    <item />
    <item />
</menu>
```

It render just icons from begining until the first subitem.
Others are ignored.
