This one’s weird as I’m not sure what differs between your project and what I have set up. I’m assuming it’s something with the updated library versions, but I’m honestly not sure (and yes, I’m seeing the same thing on my version of your code).
That being said, an easy fix is to change the attribute reference to android.R.attr.colorPrimary. It’ll pull in the <item name="colorPrimary">@color/androidGreen</item> attribute from your themes all the same.