Its not a problem getting Chinese apps on board a Chinese Android fork. It would have no problem surviving and thriving in China. But outside of China, things like Google and Facebook are imperative for any smartphone and you're not going to put those in any Chinese Android fork unless you do it yourself by downloading the apks.
Hold on, Ark can run all Android apps including Facebook where it's not banned. For Google search, it can be easily linked by browser, right? Or maybe it's also compatible with Ark; it just doesn't come with it.
Are you arguing that from now to the end of time, Android and Apple will be the only OS that are usable globally? I just don't see it. Building a new OS and nurturing and environment for it seems like a huge task but not undoable because clearly people have done it before and China's huge market is perfect for growing the buds before the environment is strong enough to go international.
But we're not even faced with that issue here because Ark is supposed to be compatible with all Android apps. Essentially, it's a Huawei-improved open source Android. So it's like your suggestion, except improved and with a new name.
Quite frankly, China already gets back what US companies make in China in the form of taxes, hiring, the FDI and the purchasing of Chinese materials.
Your solution is what? Let US companies prosper in China while Chinese companies are attacked in the US?
Well earning the money off of Chinese clients and giving a part of it back in form of taxes is still taking away from Chinese capital. The net movement is still to the US (unless they invest, fail, and leave). But I'm not talking about all US firms. US firms with technological contribution should be allowed to operate and of course, they must benefit CHINESE technology, not just technology in China. Others like MacDonalds, Starbucks, Nike, etc... are just leeches and should be given as hard a time as possible and replaced with domestic alternatives.