add feature to clear ml downloads

packages/flutter_mozilla_components/lib/src/domain/services/gecko_ml.dart

@@ -28,4 +28,8 @@ class GeckoMlService {
         .map((values) => (values! as List).cast<double>())
         .toList();
   }
+
+  Future<void> clearMlCache() {
+    return _apiInstance.clearMlCache();
+  }
 }

packages/flutter_mozilla_components/lib/src/pigeons/gecko.g.dart

@@ -8621,6 +8621,24 @@ class GeckoMlApi {
     );
     return pigeonVar_replyValue! as List<Object?>;
   }
+
+  Future<void> clearMlCache() async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.flutter_mozilla_components.GeckoMlApi.clearMlCache$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: true,
+    );
+  }
 }
 
 class GeckoBrowserExtensionApi {