Cool post @Tommertom 
I didn’t faced that problem. I’m on a Mac that could be the reason why.
Agree with you safe to ignore. One the Git repo is safe, this warning will disappear. Android Studio is based on IntellIJ and that’s a typical IntellIJ information.
Didn’t had this neither but Android Studio made a lot of updates the first time I ran my test project 
In Android Studio which tab did you opened? When I check my Project view it does look like the following:
Mmmmh I think you should open an issue about that one https://github.com/ionic-team/capacitor/issues