I see, I'm not familiar with that, but I would try leaving the list object outside of the viewport and using the set focus action to see if it triggers the system list popup dialogue. Alternatively, you could use CSS to style a listbox however you like, similarly to how the system displays it. One more option is to use javascript to directly call and build the list in an android alert dialogue.
I just did another test, and I left the list box visible, with the same size as the sprite and in the same position. But I left the text and background transparent.
When tapping on the sprite, the list opens normally on my Android, I'm just not sure if it will work on other phones, because testing it on Windows the text of the list is transparent as the box, but on Android it doesn't.