React-native link path incorrect
TLDR: Adding another folder like so java/co/AppNAme/AppName/ will fix your issue.
After updating to the latest react-native I had this issue too. Your android path contains your apps ID so com.test.app path should be android/app/src/main/java/com/test/app.
You've stated;
The path is actually incorrect
java/co/AppNAmeshould bejava/com/AppName.
This isn't correct as looking at your error message, its actually telling you where its expecting the file to be;
no such file or directory, open
java/co/AppName/AppName/MainApplication.java
If you create another folder like so java/co/AppNAme/AppName/ it will fix your issue.