To continue your analogy, it would be more akin to selling Nike shoes in your store, and calling your store Nike Store Seller, and using Nike's logo prominently in your store.
I'm sure Nike wouldn't like that, even if you were actually selling Nike shoes.
I agree that Google wasn't exactly communicative (they never are).
Wouldn't it more like having a Nike stand in a store called Google's Play App Store, with a small sign noting "this is not an official Nike stand"? (the developers name and notice).
I understand that Nike wouldn't want the unauthorized usage, but an app is a product, not a store.
Yeah, it would be more like a stand, with a huge Nike logo, and the small sign :) ( "this is not an official Nike stand").
What the developer did is hardly unique, my GF was looking for a Prezi app yesterday, and she almost installed an unofficial app, which looked really official (like the original author's, it says "This is unofficial app."):
I'm sure Nike wouldn't like that, even if you were actually selling Nike shoes.
I agree that Google wasn't exactly communicative (they never are).