release keys for flutter input source

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/common/widgets/remote_input.dart

@@ -34,7 +34,8 @@ class RawKeyFocusScope extends StatelessWidget {
             canRequestFocus: true,
             focusNode: focusNode,
             onFocusChange: onFocusChange,
-            onKey: inputModel.handleRawKeyEvent,
+            onKey: (FocusNode data, RawKeyEvent e) =>
+                inputModel.handleRawKeyEvent(e),
             child: child));
   }
 }