The online guide http://cordova.apache.org/docs/en/edge/config_ref_images.md.html says
When working in the CLI, icon source files are located within various platform-specific subdirectories within the project's www/res/icons directory. Newly created projects come with a default set of Cordova icons for you to replace for the platforms you wish to target.
But if I've only added the android platform to my CLI project then why would I want non-android resources copied into my platforms/android/assets/www/res folder?
D:\IMAPS\peter>cordova create myapp com.peter myapp
D:\IMAPS\peter\myapp>cordova platform add android
Folder PATH listing
Volume serial number is AAB8-3216