Well yeah, BlackBerry can put regular AOSP on a phone no sweat, but lack of Google services means that it's an exercise in futility. This Chinese phone has no evidence of Google services on it, so even though "intellectual property" is an alien concept in China, they won't fall afoul of Google's attack lawyers. That's probably because Google isn't the best of friends with the Communist Party of China, but I digress.
On the other hand, an actual company that isn't some chap operating out of the trunk of his car has tried a dual boot with Google Android and something else, and Google nipped that in the bud.