> We no longer have any ongoing collaboration or communication with Google due to their hostility towards open source projects based on Android.
Maybe that's partly due to GOS's behavior toward Google and its engineers. For example, maybe there would be more workarounds and back channels otherwise.
> The future of Android is as an independent company forcefully split away from Google.
You are putting a lot of eggs in that quite uncertain and unlikely basket (given how impossible it is to predict the future and also the very wide range of possibilities). Splitting Google hasn't happened yet, anywhere, despite many attempts.
If they do split, there's no reason to think Android will be independent: It could be part of a larger subset of Google, even 'old' Google. It could be sold to another large company - many would love to control half the world's phones, if only to guarantee their applications are easiest to use and competitors can be disrupted (e.g., Meta or Microsoft could benefit enormously - and Microsoft could finally extend its OS business to phones).
Even if independent, why would Android act the way you hope? Who will run it - who will its shareholders and managers be? Likely current many Google shareholders and managers would be part of the spin-off. There's no reason to think they - or even completely new people - will be more supportive of FOSS; they could go the other way.
GOS is amazing. I don't know you so likely this is off-target to some degree - my apologies: Many engineers have learned, through defeat or success, that they need more than great engineering to get their passion into people's hands and change the world. Just as essential - more essential (lots of poor engineering is widely used!) - are great business skills. There's no shame in it: very few people can do it all (who is both a great engineer and great business manager?), and none have time to do both.
I hope someday the world knows 'Graphene' and a billion use it. It's one of the most important projects around - how else can typical end users have a chance at privacy? Good luck!