[camera_platform_interface] Add API support query for image streaming (flutter#8307)

Add API support query, supportsImageStreaming for checking if the camera platform supports image streaming.

As requested on this comment: flutter/packages#8234 (comment)

Step 3 from the [changing federated plugins guide](https://github.com/flutter/flutter/blob/master/docs/ecosystem/contributing/README.md#changing-federated-plugins), split off from flutter#8250 with a new Dart test added.

Author: liff

packages/camera/camera_platform_interface/CHANGELOG.md

@@ -1,6 +1,7 @@
-## NEXT
+## 2.9.0
 
 * Updates minimum supported SDK version to Flutter 3.22/Dart 3.4.
+* Adds API support query for image streaming.
 
 ## 2.8.0
 

packages/camera/camera_platform_interface/lib/src/platform_interface/camera_platform.dart

@@ -173,6 +173,9 @@ abstract class CameraPlatform extends PlatformInterface {
     throw UnimplementedError('resumeVideoRecording() is not implemented.');
   }
 
+  /// Check whether this platform supports image streaming via [onStreamedFrameAvailable].
+  bool supportsImageStreaming() => false;
+
   /// A new streamed frame is available.
   ///
   /// Listening to this stream will start streaming, and canceling will stop.

packages/camera/camera_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/packages/tree/main/packages/camera/camera
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.8.0
+version: 2.9.0
 
 environment:
   sdk: ^3.4.0

packages/camera/camera_platform_interface/test/camera_platform_interface_test.dart

@@ -496,6 +496,19 @@ void main() {
         throwsUnimplementedError,
       );
     });
+
+    test(
+        'Default implementation of supportsImageStreaming() should return false',
+        () {
+      // Arrange
+      final ExtendsCameraPlatform cameraPlatform = ExtendsCameraPlatform();
+
+      // Act & Assert
+      expect(
+        cameraPlatform.supportsImageStreaming(),
+        false,
+      );
+    });
   });
 
   group('exports', () {