It "bothers" you? How can it "bother" you? You arent an AOSP developer.
The license is not what the author is referring to, he's referring to the fact that YOU, or I or ANYONE cannot sign up to develop AOSP and contribute to the project because its just a code dump from google with a license.
Thats NOT open source and if you think the license makes it so then you need to go up and try to make a commit no matter how trivial to AOSP. Dont be a fool...fool.