Add callbacks for errors / error states

[basshelal]

Basically when the RecyclerView will be empty we need a way to allow for a callback that will allow us to do something when something goes wrong.
I can think of 3 error states:

• No results (Search returned no results)
• No connection (Internet connection error)
• Generic error (Something else)

We mainly want this so that the caller can add Views/Layouts to display when one of these happens and callbacks too to maybe act accordingly as well.