Conversation

Replying to
There's no requirement to provide a list of the copyright owners. The licenses require you preserve the copyright notices and the authors have chosen to refer to themselves as "The Go Authors" or "The Android Open Source Project" so you just have to preserve the notice as is.
2
Replying to
In this case the individual files refer to an actual notice elsewhere instead of having a bunch of them for each file. They distribute each notice variation with software like Android. If a project has 10 files different variations of the notice, they actually ship 10 of them.
2
Replying to and
It's annoying to fully comply with the licenses as written and they do what they do with the generic notices referring to the group of authors simply to make their life easier. If they had 200 variations of authors/dates, they'd have to ship 200 notices in a user-facing UI too.
1
Replying to and
"provided that the above copyright notice appear in all copies" is actually quite annoying if there are 100 variations of the notice throughout the project. They actually comply with it to the letter and their lawyers clearly don't think it would be correct to merge the notices.