[ci+various] Partially enable javac warning checks (#3293)

Since our existing `gradlew lint` check doesn't catch all warnings (notably, deprecation warnings, but also others like raw values), this:
- Configures our plugin example apps to enable `-Xlint:all -Werror` for the javac for the plugin project, so that we also get javac lint coverage in CI. This is done in the example app so that it won't affect plugin clients.
- Adds a check to `lint-android` that the example is configured this way, so that we don't forget to set it up when adding new plugins (or re-generating plugin examples from template).

Where it was trivial for me to just fix existing violations, I did so in this PR. For the rest that had violations, I commented out the enabling of the flags, with a TODO. Normally we would do this kind of thing with a `script/configs` file to opt packages out of a new check, but since this is part of an existing check rather than a whole new command, doing it that way would disable `gradlew lint` for those packages as well. Making a whole new command seemed more complex for the long term, so this seemed like the best short term option. We should try to remove as many of these opt-outs as possible ASAP.

Part of https://github.com/flutter/flutter/issues/91868
39 files changed
tree: 2867d6d9111515753f934358de73afce24de34ab
  1. .ci/
  2. .github/
  3. packages/
  4. script/
  5. third_party/
  6. .ci.yaml
  7. .cirrus.yml
  8. .clang-format
  9. .gitattributes
  10. .gitignore
  11. .gitmodules
  12. .metadata
  13. analysis_options.yaml
  14. AUTHORS
  15. CODEOWNERS
  16. CONTRIBUTING.md
  17. customer_testing.bat
  18. customer_testing.sh
  19. LICENSE
  20. README.md
README.md

Flutter Packages

Build Status Release Status OpenSSF Scorecard

This repo is a companion repo to the main flutter repo. It contains the source code for Flutter's first-party packages (i.e., packages developed by the core Flutter team). Check the packages directory to see all packages.

These packages are also available on pub.

Issues

Please file any issues, bugs, or feature requests in the main flutter repo. Issues pertaining to this repository are labeled “package”.

Contributing

If you wish to contribute a new package to the Flutter ecosystem, please see the documentation for developing packages. You can store your package source code in any GitHub repository (the present repo is only intended for packages developed by the core Flutter team). Once your package is ready you can publish to the pub repository.

If you wish to contribute a change to any of the existing packages in this repo, please review our contribution guide, and send a pull request.

Packages

These are the packages hosted in this repository:

PackagePubPointsPopularityIssuesPull requests
animationspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
camerapub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
cross_filepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
css_colorspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
cupertino_iconspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
espressopub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
extension_google_sign_in_as_googleapis_authpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
file_selectorpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_adaptive_scaffoldpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_imagepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_lintspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_markdownpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_plugin_android_lifecyclepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_template_imagespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
go_routerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
go_router_builderpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
google_maps_flutterpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
google_sign_inpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
image_pickerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
in_app_purchasepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
ios_platform_imagespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
local_authpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
metrics_centerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
multicast_dnspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
palette_generatorpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
path_providerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
pigeonpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
pointer_interceptorpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
plugin_platform_interfacepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
quick_actionspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
rfwpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
shared_preferencespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
standard_message_codecpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
url_launcherpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
video_playerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
web_benchmarkspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
webview_flutterpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
xdg_directoriespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label