The anti-trust trouble for Google is if you want to futz around and ship your own version of Android you are banned from shipping ANYTHING with Google services, due to the anti-fork provision in the agreement required to ship Google services.
That's why Samsung has Tizen instead of an Android fork: if they shipped a version of AOSP with their own apps and store running on top of it they wouldn't be able to ship anything with Google services on it. Not only that but you can't contract manufacture those devices either, which is why Amazon has to go with third-tier companies to make their Fire tablets and why factory Cyanogen installs are likewise limited to small one-off manufacturers.
It is no different than Microsoft or Intel saying "Sure you can ship a -nix/AMD device, but you can't ship a Windows/Intel device at the same time. Oh that would completely obliterate most of your business? Funny how that works isn't it."