This reverts commit d3ee5ace.

Resolved contradictory documentation of showGeneralDialog and default value of 'barrierLabel' argument (#78890)

[flutter_tools] migrate tool_backend.dart to null safety and add testing of exit conditions (#78988)

Add ability to control RefreshProgressIndicator's distance from edges.

This reverts commit 8caf4d44.

This reverts commit 515ef91b.

This reverts commit a2f5b18e.

- Remove `LogicalKeyboardKey.keyLabel`
- Make `Physical/LogicalKeyboardKey.debugName` getters
- Make `Physical/LogicalKeyboardKey()` factory constructors, which cache non-predefined instances.

* Remove need for unused import for placeholder braces

* Remove need for unused intl import for when plurals aren't used in the generated code

* Add dismiss action to modal barrier

* fix test

* fix another test

* Revert "Enable dart_plugin_registry_test (#76645)"

This reverts commit 109e0bb9.

* Revert "Apply changes caused by https://github.com/flutter/flutter/pull/76662 (#77093)"

This reverts commit cdca6485.

* Revert "Disable clang format in the plugin registrants (#76662)"

This reverts commit dadbd47d.

* Revert "Disable warnings for the dart plugin registrant (#76561)"

This reverts commit 098ece52.

* Revert "Remove dart_plugin_registry_test timeouts (#76838)"

This reverts commit 1610a274.

* Revert "Implement dartPluginClass support for plugins (#74469)"

This reverts commit b7d48062.

Kick.