My first instinct was to post here jokes about how Android is open, but in a closed way. I'm generally speaking an iOS/Apple symapathist. Just check my posting history. But on reflection and investigation fo what's actually going on, I think Google are trying to do the right thing. They have no leverage over Alibaba directly though, so they're putting pressure on Acer. If Acer wanted to fork Android like B&N or Amazon then fine, but getting the benefits of their OHA commitments means meeting their responsibilities. Supporting a marketing parasite like Alibaba is a step too far.
If they don't remove it fairly promptly then yes maybe Google can take some action. I would expect that with clear cases of copyright infringement that Google at least could take a case.
In the mean time update your app to detect when it is running on Aliyun and include a half screen promotion for China's leading real Android phone.
How about you ask the guy who stole your car (After figuring out who stole it) and if they don't return it to you, then complain to police?
If the scale isn't large don't worry about it.
It is copyright infringement, you still have your car (going back to your analogy). Also it may be that Aliyun is the used car dealer that has stolen cars but don't know it, the pirates are the ones who uploaded/submitted it to them.
There have been cases on Apple and Google stores of copyright infringing apps although these get removed when reported.
Apparently, they even have pirated google apps. How Alibaba/Acer claim moral high ground on this is beyond me.