Magic is a sort of resource in the world, anybody can pick it up and manipulate it, even machines. That's why a tablet casting spells is viable, and an android actually could conceivably use magic as well. I actually liked the idea of a techno mage, because I was going to make a "traditional" magician, and I thought it'd be funny if they were rivals. 
As someone said, the difference between emulating magic and actually using it is kind of blurry, in any setting like this.

Anyone ever read Jonathan Strange and Mr. Norrell? First of all, that's pretty much how I imagine magic in this. Second of all, in that book it's said that fairies(though there won't be any in this) and humans both have a faculty for logic, and one for magic. In fairies, the magic is high, but the logic is low. In humans it's the other way around. In this world, androids have a high faculty for logic(of course) but often can't wrap their heads around magic. Humans vary greatly. People who are too logical and literal have trouble with magic, but that doesn't mean they can't do it.
Androids can in fact utilize magic, as it's not coming from the "soul" or anything. It's just a force, a resource that exists in this world.
It comes from the stars, basically it's an additional kind of radiation that stars give off in this world.

Did I miss anything? Is any more clarification needed?