This reverts commit 7c24ff2c.

Top level `pub` is being deprecated.

* Fixes renderparagraph crashes due to truncated semantics node

* add period

Co-authored-by: Alexander Dahlberg <alexander.dahlberg@sigma.se>

This PR fixed the problem that prevented platform_channel_test.dart being shuffled. Part of #85160.

A couple of tests sets up callbacks through setMethodCallHandler() that gets unresolved and breaks other tests.

This PR clears those callbacks by passing null to setMethodCallHandler.

e3d19b330 Add browser_launcher and webkit_inspection_protocol packages (flutter/engine#28252) (#88722)

0a86ac866 [camera] android-rework part 9: Final implementation of camera class (flutter/plugins#4059) (#88718)

* add marging to vertical stepper

* Remove tralling spaces

* Update docstring

This PR fixed the problem that has prevented app_overrides_test.dart being shuffled. Part of #85160.

This test is testing WidgetsApp.showPerformanceOverlayOverride and WidgetsApp.debugAllowBannerOverride.

The problem: There was a strong dependecy to the default ordering of the tests. The value of showPerformanceOverlayOverride or debugAllowBannerOverride was expected to be the value that was set in previous test.

The fix: Make the values be set to default values after each test:
WidgetsApp.showPerformanceOverlayOverride=false
WidgetsApp.debugAllowBannerOverride=true
Set the expected value at the start of the test, if the default value is not expected.

Co-authored-by: Alexander Dahlberg <alexander.dahlberg@sigma.se>

This PR fixed the problem that has prevented scheduler_test.dart being shuffled. Part of #85160.

One test schedules a task, but events are locked so the scheduled task does not execute and this messes up other tests.
This PR adds a teardown that executes the scheduled task after the test, when events are unlocked.

Fixes test/painting/image_stream_test.dart of #85160

The problem: The timeDilation was changed to 2.0 but not restored. The changed timeDilation carried on to following tests which messed up some of them when using test ordering seed 456.

The Fix: Restore timeDilation to 1.0 at the end of test.

Fixes test/gestures/long_press_test.dart of #85160

The LongPressGestureRecognizer in test 'non-allowed pointer does not inadvertently reset the recognizer' was not disposed breaking a lot of other tests.

6a8681e7a [image_picker] Fix pickImage not returning on iOS when dismissing the PHPicker view by swiping down. (flutter/plugins#4228) (#88699)

710af46d5 Roll Dart SDK from c17fd9df122a to 2b84af1e5f1a (1 revision) (flutter/engine#28254) (#88675)

4783663ee Roll Dart SDK from c20ef394e132 to c17fd9df122a (1 revision) (flutter/engine#28247) (#88657)

1a531179d Roll Dart SDK from 64d00fee8462 to c20ef394e132 (1 revision) (flutter/engine#28245) (#88654)

1accc709a Roll Dart SDK from ee5b5dc4d910 to 64d00fee8462 (1 revision) (flutter/engine#28244) (#88631)