What does the ic_launcher-web.png in my project root do?
It's for the Play Store, which accepts 512x512 high-resolution icons:
- High Resolution Application Icon (Required):
- Use: In various locations in Google Play.
- Specs: 512x512, 32-bit PNG with alpha; Max size of 1024KB.
(A more tutorial like explanation can be found here.)
It is not used in your actual app or the launcher, so it is not packaged in the APK.
There is a little bit of an explanation here on this page:
http://developer.android.com/guide/practices/ui_guidelines/icon_design_launcher.html#size