* 03e750d6f Roll Fuchsia Linux SDK from g6EuxMthn... to DzZi2gPbF... (flutter/engine#22417)

* 80e9a3fc2 Roll Skia from 84d503b21322 to 5b8598952931 (7 revisions) (flutter/engine#22418)

* 80cc0fae7 Roll Skia from 5b8598952931 to 02dd0ed8ce5e (1 revision) (flutter/engine#22419)

* d14c4a742 Roll Skia from 02dd0ed8ce5e to fb5850f41043 (4 revisions) (flutter/engine#22420)

* af185be87 Roll Skia from fb5850f41043 to 008d63e23dab (6 revisions) (flutter/engine#22421)

* 1a13dac52 Simplify API for scheduling Skia object deletions (flutter/engine#22409)

* 49299c37d Roll Skia from 008d63e23dab to 267826c86552 (4 revisions) (flutter/engine#22422)

* 25e08298a Roll Fuchsia Mac SDK from w10eytxvc... to e-4Jm-yWa... (flutter/engine#22423)

* 76e615859 Roll Skia from 267826c86552 to 88e8bb2fe2d5 (3 revisions) (flutter/engine#22424)

* caf678d30 Move common graphics utils to //flutter/common/graphics (flutter/engine#22320)

Disabled caching of pub invocations on flutter drive.

This reverts commit a90880a8.

[flutter_tools] remove most globals from asset system and remove Cache manipulation in unit tests (#70011)

This reverts commit ff953e4f.

Fixes #69416
Fixes #70121

Necessary to work around #70013 (this looks like it will be fixed, but should protect us in the future)

Restores some notion of skipping pub, with differences from the prior implementation:

Off by default, and only used by the flutter command automatic pub get
A single check parameter. Uses the framework version cached per-project instead of a timestamp of the tool, to avoid cases where downloading a prebuilt framework would cause this check to no longer work.

Remove references to `Window`, and switch usages to `PlatformDispatcher` or `SingletonFlutterWindow` (#69617)

* Remove references to dart:ui.Window, and point usages to PlatformDispatcher or SingletonFlutterWindow, as appropriate

* remove new test platform dispatchers

* Amend documentation

* Added Dartpad sample for Table widget

* Changed template to stateless_widget_scaffold

* Removed trailing character

This reverts commit 6e5845f0.

* [null-safety] migrate flutter gallery to null safety

* Fix crash when widgetspan does not produce a semantics node in render paragraph

* fix comments

* fixed corner case, added test, refactored semantics widget

* addressing comment

* [integration_test] Add a setter for defaultTestTimeout

* type annotation

* More type annotations

* Fix doc

This reverts ae0a9cb5 and therefore relands #69629.

Additionally, `flutter update-packages --force-upgrade` has been run to update `pubspec.yaml` to resolve the analyze test failures.

* Ignore import_of_legacy_library_into_null_safe instead of un-migrating.