- Updates DWDS from `19.0.2` to `20.0.1`
- Makes the required changes for the breaking changes to the `AssetReader` class

Fixes https://github.com/flutter/flutter/issues/132157

To avoid analyzer warnings when utf8.encode() will return the more
precise Uint8List type, we use const Utf8Encoder().convert() which
already returns Uint8List

See https://github.com/dart-lang/sdk/issues/52801

flutter-tool: enum cleanup

flutter_tools: Flutter Web CLI cleanup

Add support to the flutter tool to compile against the skwasm renderer

flutter_tool: add and use WebCompilerConfig

Add tools test for buildWeb compilation

Always use the canvaskit path from the web sdk.

throw `ToolExit` when `--web-port` is an integer outside the valid TCP port range

Revert "[flutter_tools] Remove sound null safety flag (#123031)"

[flutter_tools] Remove sound null safety flag #2

This reverts commit 7c3088cf.

[flutter_tools] Remove sound null safety flag

[web] Ensure CanvasKit is served from the correct location

Adds vmservices for getting iOS build options

Roll pub packages

* lerp documentation

* Remove Note, Note That from repo

* Improve BorderSide documentation.

* apply review comments

This reverts commit 0fb4406c.

This reverts commit e03029ef.

This is already handled by pkg:shelf
There is some subtlety with String here, since String.length might not
align with the size in bytes over the wire, depending on the contents
and the encoding

Best to just let pkg:shelf handle it

* roll packages

* fix dwds

* empty

---------
Co-authored-by: fluttergithubbot <fluttergithubbot@gmail.com>

* [web] Put all index.html operations in one place

* review comments

* fix build

* change quotes

* fix test

The changes to the Dart SDK have rolled so the backward compatibility
is no longer needed.

* dart fix --apply

* manual fixes

* fix after merge conflicts

* review

- Matches new location in the Dart SDK.
   https://dart-review.googlesource.com/c/sdk/+/275482
- Includes fall back logic so the existing and new locations will work
  depending on the file that is available.

* Work in progress.

* Some fixes to the command line.

* Bootstrapping works.

* Change kickoff order to maximize concurrency.

* Fix analyzer errors and formatting issues.

* Fix doc comment.

* Added unit tests for some of the web targets.

* Format issue.

* Add an integration test that builds an app to wasm.

* Add a todo for depfiles.

* Formatting.

* Apparently the license header needs to say 2014.

* `file://` URIs confuse dart2wasm on Windows. Just use absolute paths.

* Update unit tests to match new path passing.

* Have a distinct build directory for wasm, and fixes for some upstream changes.

You can now specify a --local-web-sdk flag to point to a wasm_release folder. This will make it so that only artifacts that pertain to the web sdk are overridden to point to the wasm_release folder. Other artifacts (such as impellerc) will pull from the cache, or from the --local-engine path if that is specified.

This also uses precompiled platform kernel files for both ddc and dart2js

* [flutter_tools] Add --dump-info, --no-frequency-based-minification flags

Also some cleanup to named arguments to the buildWeb function

Fixes https://github.com/flutter/flutter/issues/115854

* fix tests

This reverts commit f8f69575.

* Migrate packages/flutter_tools/bin

* Fix NPE

* Fix test

* Fix test

* Fix l10n optionalParameters

* Fix ChromeTab nullability

* Fix another type cast error

* Fix another cast error

* Fix another cast error (copied from #110711)

* Fix NPE

* Fix another NPE

* Assert that testDirectory is not null