I did some digging to find out more about the Android 7 nougat version and compatibility with the Dji GO4 app. And based on what I found out....is if you in fact have a nVidia K1 Shield, DO NOT update to Android 7 Nougat!
Apparently the Android 7 has a new hybrid AOT/JIT compiler that will have major issue with apps until the apps go through being updated. As for the GO4 app....I was told it's a mammoth task to rework the GO4 app for Android 7. The only option for anyone now with the Android 7 installed, must rollback to Android 6 marshmallow. If you have already rolled back and have decent instruction on how to for the nVidia, please post that info here to share with others in need.
Btw, they say GO4 was actually written for Android 5 using C++.