[various] Replace deprecated Color.value in SVG packages (#10482)

Replaces the deprecated `Color.value` with the equivalent `toARGB()`. While this method is discouraged for many use cases, since it's for interacting with the `vector_graphics` `Color` class, which uses a 32-bit ARGB value as its fundamental representation, this appears to be the correct replacement.

Part of flutter/flutter#159739

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Author: stuartmorgan-g

packages/vector_graphics/test/listener_test.dart

@@ -108,7 +108,7 @@ void main() {
     final FlutterVectorGraphicsListener listener =
         FlutterVectorGraphicsListener(pictureFactory: factory);
     listener.onPaintObject(
-      color: const ui.Color(0xff000000).value,
+      color: const ui.Color(0xff000000).toARGB32(),
       strokeCap: null,
       strokeJoin: null,
       blendMode: BlendMode.srcIn.index,

third_party/packages/flutter_svg/CHANGELOG.md

@@ -1,5 +1,6 @@
-## NEXT
+## 2.2.3
 
+* Replaces use of deprecated Color.value.
 * Updates minimum supported SDK version to Flutter 3.32/Dart 3.8.
 
 ## 2.2.2

third_party/packages/flutter_svg/lib/src/loaders.dart

@@ -47,7 +47,7 @@ class SvgTheme {
   /// Creates a [vg.SvgTheme] from this.
   vg.SvgTheme toVgTheme() {
     return vg.SvgTheme(
-      currentColor: vg.Color(currentColor.value),
+      currentColor: vg.Color(currentColor.toARGB32()),
       fontSize: fontSize,
       xHeight: xHeight,
     );
@@ -111,7 +111,7 @@ class _DelegateVgColorMapper extends vg.ColorMapper {
       attributeName,
       Color(color.value),
     );
-    return vg.Color(substituteColor.value);
+    return vg.Color(substituteColor.toARGB32());
   }
 }
 

third_party/packages/flutter_svg/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_svg
 description: An SVG rendering and widget library for Flutter, which allows painting and displaying Scalable Vector Graphics 1.1 files.
 repository: https://github.com/flutter/packages/tree/main/third_party/packages/flutter_svg
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_svg%22
-version: 2.2.2
+version: 2.2.3
 
 environment:
   sdk: ^3.8.0