Removes two plugin tests that aren't actually doing anything useful.
When they were added they were testing v2-embedding plugins in a v1-embedding app, but support for creating v1-embedding apps--and the environment variable that these tests were using to, in theory, trigger them--was removed several years ago in #61203. That means that these tests are in practice exact duplicates of the copies just above without the ennvironment variables.
Fixes https://github.com/flutter/flutter/issues/122200
* Update project.pbxproj files to say Flutter rather than Chromium
Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.
* Update the copyright notice checker to require a standard notice on all files
* Update copyrights on Dart files. (This was a mechanical commit.)
* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.
Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).
* Clean up the copyrights in non-Dart files. (Manual edits.)
Also, make sure templates don't have copyrights.
* Fix some more ORGANIZATIONNAMEs
