I am not an Android developer myself, but my understanding is that you can write extremely performant code, so it's probably not true that Java is holding back developers who want to write stutter-free apps.
So this might have changed, it's been a while since I looked into Android dev, but I think that some of the C++ integration stuff ends up hitting FFI latency. So you can get good performance, but you're still bound to (for example) latency in the input layer because your hooks into the OS HID layer is still going through the same stuff, _and_ you have some FFI nonsense.
I imagine that thanks to people at Epic and Unity that things will have improved much on that front, it's not like games don't exist on Android after all.
I am not an Android developer myself, but my understanding is that you can write extremely performant code, so it's probably not true that Java is holding back developers who want to write stutter-free apps.