Flutter 3.7.0 (#1556)

* Update `simplistic_editor` for Flutter 3.4 beta

* Re-enable beta and master CI

* Disable on master

* Added sample code for using plugins and channels from background isolates.

* goderbauer feedback 1

* goderbauer feedback2

* goderbauer feedback 3

* Add `background_isolate_channels` to CI

* Enable beta CI

* Enable all `stable` CI projects

* `dart fix --apply`

* `print` -> `denugPrint`

* Make deps min version not pinned

* Drop `_isDebug`

* Remove unused import

* `dart format`

* Fixup `linting_tool`

* Fixup `form_app`

* Enable all `master` CI

* Basic fixes

* Patch `simplistic_editor`

* Fix nl at eol

* Comment out `simplistic_editor`

* Incorporating @bleroux's latest changes

* Clean up CI scripts

* Copy `experimental/material_3_demo` to top level

* Update `game_template`

* Update `animations`

* Update `desktop_photo_search`

* Update `flutter_maps_firestore`

* Update `form_app`

* Update `infinite_list`

* Update `isolate_example`

* Update `jsonexample`

* Update `navigation_and_routing`

* Update `place_tracker`

* Update `platform_channels`

* Update `platform_design`

* Update `provider_shopper`

* Fixup `context_menus`

* `dart format`

* Update the main `material_3_demo`

* Make `tool/flutter_ci_script_stable.sh` executable again

Co-authored-by: Bruno Leroux <bruno.leroux@gmail.com>
Co-authored-by: Aaron Clarke <aaclarke@google.com>

navigation_and_routing/macos/Podfile

@@ -1,4 +1,4 @@
-platform :osx, '10.11'
+platform :osx, '10.14'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'