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

Workaround for exhaustiveness bug in dart2js

Remove 1745 decorative breaks

Roll Flutter Engine from 5775c6b05fa4 to ccc32758588c (7 revisions)

Documentation improvements

Add documentation saying that people can add themselves to the AUTHORS file

Marks Linux engine_dependency_proxy_test to be unflaky

Roll Flutter Engine from bb51cda2fa47 to 5775c6b05fa4 (1 revision)

Update dartdoc to 6.2.0

Roll Packages from 694f82b34316 to 75491e98c0d1 (15 revisions)

Manual roll Flutter Engine from c266826b24bf to bb51cda2fa47 (7 revisions)

* Make custom `Utf8Decoder` replacement not extend platform class.

The Dart 3.0 class modifiers will make `Utf8Decoder`, and other
pure implementation classes, be `final`.

This replacement class does not need to extend the original
class, just like the `Utf8Codec` in the same file doesn't
extend the `Ut8Codec` from the platform libraries.

Instead it can just forward to a single `const` instance of the
original class.

* Forgot one constant

* Fix merge conflict.

---------
Co-authored-by: Zachary Anderson <zanderso@users.noreply.github.com>

Provide an ApplicationPackage to the flutter_tools logs command

c266826b2 Roll Skia from 574b1eefd3bd to c5a28115fe5f (3 revisions) (flutter/engine#40521) (#123196)

Roll Flutter Engine from d0e71494ad5f to c266826b24bf (1 revision)

Roll Flutter Engine from 718af87632ad to d0e71494ad5f (3 revisions)

718af8763 Roll Fuchsia Mac SDK from vdrDvqVpPEp_l5cT4... to Q2XkmCZ1C5vUGoxvz... (flutter/engine#40514) (#123186)

Roll Flutter Engine from 51082515db18 to 718af87632ad (1 revision)

Roll Flutter Engine from 9a742fa4eaf2 to 51082515db18 (1 revision)

Remove window reference from doc snippet

Co-authored-by: godofredoc <godofredoc@google.com>

9a742fa4e Roll Skia from 6cdd4b3f9b8e to 3e6bfdfea566 (3 revisions) (flutter/engine#40510) (#123181)

Roll Flutter Engine from 62f284479485 to 9a742fa4eaf2 (1 revision)

Roll Flutter Engine from 619d721c3686 to 62f284479485 (10 revisions)

* Marks Linux_android old_gallery__transition_perf to be unflaky

* trigger builds

---------
Co-authored-by: Keyong Han <keyonghan@google.com>
Co-authored-by: godofredoc <godofredoc@google.com>

[flutter_tools] toolexit on malformed yaml during gen-l10n

Remove indicator from scrolling tab bars

Fix Gradle warning in a freshly `flutter create`ed Android project

Adding timestamps to task runner output lines.

Enable prefer_mixin

Roll Flutter Engine from 87ddd910f1ad to 619d721c3686 (8 revisions)

delete sksl benchmarks

Use DeviceDiscoveryFilter correctly in ProxiedDevices.

Deprecate BindingBase.window

Manual roll Flutter Engine from e07fb9b5dd4a to 87ddd910f1ad (8 revisions)

Bump lower Dart SDK constraints to 3.0 & add class modifiers

[flutter_tools] replace --no-analytics with --suppress-analytics

Deprecates `TestWindow`

Set plugin template minimum iOS version to 11.0

Roll Packages from bbf86a7e1a83 to 694f82b34316 (12 revisions)

Create cupertino checkbox

Roll Flutter Engine from 1b289e20c2c4 to e07fb9b5dd4a (3 revisions)