i need to clarify for my app so that can use the terminology for ease of development in my android app.
Any links or related reference information will be appreciated.
The page you are citing is using the word "surface" as a verb, not an adjective. In this case, "surface" means "to show" or "to display".
The sentence that I suspect is the source of your confusion:
When selecting data, contextual action bars allow you to surface actions.
...could be rewritten as:
When selecting data, contextual action bars allow you to display actions that formerly had not been displayed.