The NDK is pervasively used by many many applications; that's why it's getting more support.
For some reason this seems unpopular with the android team, who seem to keep trying to avoid the issue when ever its raised at I/O...but hey, clearly at least someone is paying attention to what the statistics are showing.
Sure, it's some extra hoops to jump though; but shared business logic that you can use on any code base on any platform; that's a really really compelling reason to use the NDK, or one of the stacks based on it (eg. Xamarin, react native).
It's not just for some edge case. The biggest players in the field are doing this.
I think it's misrepresentative to try to characterize this as 'just for games'...
