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>

material_3_demo/lib/elevation_screen.dart

@@ -12,37 +12,47 @@ class ElevationScreen extends StatelessWidget {
     Color shadowColor = Theme.of(context).colorScheme.shadow;
     Color surfaceTint = Theme.of(context).colorScheme.primary;
     return Expanded(
-      child: ListView(
-        children: [
-          Padding(
-            padding: const EdgeInsets.fromLTRB(16.0, 20, 16.0, 0),
-            child: Text(
-              'Surface Tint only',
-              style: Theme.of(context).textTheme.titleLarge,
+      child: CustomScrollView(
+        slivers: [
+          SliverToBoxAdapter(
+            child: Padding(
+              padding: const EdgeInsets.fromLTRB(16.0, 20, 16.0, 0),
+              child: Text(
+                'Surface Tint Color Only',
+                style: Theme.of(context).textTheme.titleLarge,
+              ),
             ),
           ),
           ElevationGrid(surfaceTintColor: surfaceTint),
-          const SizedBox(height: 10),
-          Padding(
-            padding: const EdgeInsets.fromLTRB(16.0, 8.0, 16.0, 0),
-            child: Text(
-              'Surface Tint and Shadow',
-              style: Theme.of(context).textTheme.titleLarge,
-            ),
+          SliverList(
+            delegate: SliverChildListDelegate(<Widget>[
+              const SizedBox(height: 10),
+              Padding(
+                padding: const EdgeInsets.fromLTRB(16.0, 8.0, 16.0, 0),
+                child: Text(
+                  'Surface Tint Color and Shadow Color',
+                  style: Theme.of(context).textTheme.titleLarge,
+                ),
+              ),
+            ]),
           ),
           ElevationGrid(
             shadowColor: shadowColor,
             surfaceTintColor: surfaceTint,
           ),
-          const SizedBox(height: 10),
-          Padding(
-            padding: const EdgeInsets.fromLTRB(16.0, 8.0, 16.0, 0),
-            child: Text(
-              'Shadow only',
-              style: Theme.of(context).textTheme.titleLarge,
-            ),
+          SliverList(
+            delegate: SliverChildListDelegate(<Widget>[
+              const SizedBox(height: 10),
+              Padding(
+                padding: const EdgeInsets.fromLTRB(16.0, 8.0, 16.0, 0),
+                child: Text(
+                  'Shadow Color Only',
+                  style: Theme.of(context).textTheme.titleLarge,
+                ),
+              ),
+            ]),
           ),
-          ElevationGrid(shadowColor: shadowColor)
+          ElevationGrid(shadowColor: shadowColor),
         ],
       ),
     );
@@ -72,18 +82,16 @@ class ElevationGrid extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Padding(
+    return SliverPadding(
       padding: const EdgeInsets.all(8),
-      child: LayoutBuilder(builder: (context, constraints) {
-        if (constraints.maxWidth < narrowScreenWidthThreshold) {
-          return GridView.count(
-            shrinkWrap: true,
+      sliver: SliverLayoutBuilder(builder: (context, constraints) {
+        if (constraints.crossAxisExtent < narrowScreenWidthThreshold) {
+          return SliverGrid.count(
             crossAxisCount: 3,
             children: elevationCards(shadowColor, surfaceTintColor),
           );
         } else {
-          return GridView.count(
-            shrinkWrap: true,
+          return SliverGrid.count(
             crossAxisCount: 6,
             children: elevationCards(shadowColor, surfaceTintColor),
           );
@@ -117,7 +125,6 @@ class _ElevationCardState extends State<ElevationCard> {
   @override
   Widget build(BuildContext context) {
     const BorderRadius borderRadius = BorderRadius.all(Radius.circular(4.0));
-    final bool showOpacity = _elevation == widget.info.elevation;
     final Color color = Theme.of(context).colorScheme.surface;
 
     return Padding(
@@ -142,7 +149,7 @@ class _ElevationCardState extends State<ElevationCard> {
                 '${widget.info.level.toInt()} dp',
                 style: Theme.of(context).textTheme.labelMedium,
               ),
-              if (showOpacity)
+              if (widget.surfaceTint != null)
                 Expanded(
                   child: Align(
                     alignment: Alignment.bottomRight,