Add feature flags for android, ios, and fuchsia (on by default). After updating the g3 rollers, the fuchsia feature will be turned off by default. Creates a simpler base type of feature flags for g3 to extend.
Updates android, ios, fuchsia workflows to use feature flags check.
Removes concept of stable artifacts and checks on flutter version.
Fixes#58999#52859#12768
update flutter precache --force to delete all stamp files. In the event that a user is hitting a cache issue, this should be easier than re-downloading all artifacts or manually blowing away the cache.
This is probably how it should have worked in the first place
Makes the following changes to the behavior of precache:
- The --all-platforms flags now fetches all artifacts, rather than just
turning off platform filtering of selected artifacts.
- Explicitly requested artifacts are no longer subject to platform
filtering. E.g., 'precache --ios' will download iOS artifacts on
Windows and Linux (but 'precache' without an 'ios' flag will still
only download iOS artifacts on macOS).
- Desktop platform artifacts now respect the bypassing of platform
filtering.
Fixes#53272
* 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
