Go doesn't seem to me as a good choice to develop apps. Why do you think they would move to Go? I would go to kotlin instead of other language if I needed to replace java
I assumed Go would be high on the list due to the fact that they have full control over it (avoiding Oracle and their lawyers) and it has good performance. I agree that Kotlin is probably a better language for writing Android apps. Having done a ton of Java, I was pleasantly surprised at how lovely it is to work with.
Golang doesn't seem a good choice for native apps because it lacks a UI framework.
It seems to me that if you want to make apps for users
with Golang, you would make webapps. If you're making webapps, you don't need to put Go on Android.