No, the Indian definition of a "single-brand store" really means a store operated by a single manufacturer. APRs like iStore are not owned by Apple, so the rules do not apply. (And they do not sell a single brand either, most accessories are not made by Apple.)
You really only find single brand stores in India from brands that do a lot of production there (Samsonite, Timberland, Hush Puppies, Burberry, Lacoste etc.). It is actually quite easy to tell. If anything is not priced a LOT higher than anywhere else, it is likely made in India. E.g. a Hugo Boss shirt in Mumbai easily costs 300% of what it costs in Europe, while a Lacoste polo shirt is 20-30% less.
Their protectionism is dead crazy.
And self destructing...