[url_launcher] Re-endorse web implementation. (flutter-team-archive#3557

)

This change re-endorses url_launcher_web, now that it's been migrated to null-safety.

[url_launcher_web] Migrate to null-safety (flutter-team-archive#3522)

This version uses auto-generated Mocks from mockito5 for its tests.

For now, tests only run in the `master` channel.

Co-authored-by: Maurits van Beusekom <maurits@baseflow.com>

[path_provider] Update Windows implementation version (flutter-team-a…

…rchive#3541)

[google_maps_flutter] Fix CameraPosition regression (flutter-team-arc…

…hive#3547)

The nullability conversion added a type check when recreating a
CameraPosition from JSON that was too restrictive, and regressed the
app-facing package. This relaxes that assertion, and adds a test to
catch the issue.

[camera] NNBD migration of the camera plugin (flutter-team-archive#3533)

* Migrate camera_platform_interface to null safety

* Exclude camera_platform_interface from all plugins script

* Convert CameraId in test to non-nullable

* Migrate to nullsafety

* Attempt to fix dependency problem building all plugins

* Update version information

* Fix type

* Make exposureMode and focusMode non-nullable

* Mark google_maps_flutter as non-NNBD

* Update dependencies

* Added missing entry to CHANGELOG.md

* Rebased on master

[google_maps_flutter] Migrate platform interface to null safety (flut…

…ter-team-archive#3539)

Part of flutter/flutter#75236

Includes a significant refactor of the various overlay objects to remove a lot of identical code across the objects.

Update video_player_web to point to new video_player_interface (flutt…

…er-team-archive#3536)

Move plugin tools code (flutter-team-archive#3544)

Bump ffi dependencies (flutter-team-archive#3540)

* Update to FFI 1.0

* Bump CHANGELOG

[image_picker_web] Migrate to null-safety (flutter-team-archive#3535)