Summary:
In accessibility mode it is important to be visually aware of the order of the elements on the screen aside from the list on the left
To enable this let's show the indices on the elements
Voice over assumes single continuous list of objects so it is okay to pass index of children we should never have nested lists in accessibility mode
Reviewed By: lblasa
Differential Revision: D49440400
fbshipit-source-id: e6878b4b33952053823451ad76993259f0794067
60364eadca