Plan 'B' for everyone
Other Chinese phone manufacturers may have incentive to adopt this OS also as a backup plan. They know that while they may not be in the American cross-hairs at the moment, any Chinese company which shows signs of success in their market can be a target for the US.
The Americans are unmatched experts at weaponising the supply chain against their competitors, and they are showing less and less restraint when it comes to using this capability. Every significant cell phone company outside of the US, which means everyone except Apple has to be thinking about this and what it could mean for them.
What might help adoption around the world is if instead of there being a walled garden, people could use whatever app, email, and other services vendors they felt like instead of being tied to the OS vendor. Apple and Google are the modern day IBM and Microsoft respectively, vertically integrated corporate behemoths whose main skill is vendor lock-in and fleecing customers for every penny they've got.
The Americans don't trust the Chinese and the Chinese don't trust the Americans. In the rest of the world only a lunatic would trust either the Americans or the Chinese. Neither are innocent and they both do what they accuse each other of doing.
I'd like to see a more decentralised world in which no one country has this sort of power over another, because otherwise some day that power will be used against my own country. There's no reason why things have to be the way they are other than somebody is making a lot of money out of it.
I think that for somebody to make a success in the market at this point, they need to bring something new to it, and by "new" I don't mean more mega-pixels. What would really be new is a phone environment that is designed to be decentralised rather than under centralised control. One where I don't have to "trust" someone in another country, but rather can choose who can do what with my phone and whether they have access to any of my personal information. It means that the company selling phones would have to give up being the next Google or Apple, but being the next Apple or Google isn't offering a real alternative, it's just more of the same.
I'm afraid that isn't likely to happen in this case, but it's nice to dream that it could.