My hunch is that Google is trying to migrate away from Android. Flutter is both the abstraction layer to do that and the new SDK for the new platform.
If that's the case, it's higly unlikely.
If that's the case, it's higly unlikely.
In terms of migrating away from Android, I think they will use the newer AndroidX packages as the future abstraction layer, which would enable them to replace the underlying runtime with something more native for each platform. It would be a compilation target for Kotlin as well as Dart. All while not deprecating the massive amount of production code out there. But, this is also just a guess.
https://developer.android.com/reference/androidx/packages
It's current implementation uses classes that are part of the Android layer, mostly the old support library plus some new abstractions like LiveData and Room and Navigation. I see no reason why you could not use the public interface of that library as a compatibility layer for application level code and let it run on a different platform.
Not today, but given the fact that you can't just kill the worlds most used operating system, you either use virtualization like Apple now does again for ARM (and before when replacing Motorola with Intel) or you change the underlying dependencies of the libraries used and compile again.