structuredClone accepts boxed Symbols as empty objects

Description

The React Native structuredClone polyfill correctly rejects primitive Symbols but treats boxed Symbols as arbitrary objects. structuredClone(Object(Symbol())) therefore returns {} instead of throwing, even though boxed Symbols are also not structured-cloneable.

Expected behavior

Boxed Symbols should throw DataCloneError, matching native structuredClone. The error path should not string-coerce the wrapper because Hermes throws a separate TypeError for that coercion.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

从 React Native 的 structuredClone polyfill 开始，使用 Object(Symbol()) 重现该问题。将其行为与原生 structuredClone 以及现有的 primitive-Symbol 路径进行比较。当 boxed Symbols 抛出 DataCloneError 且不会将 wrapper 强制转换为字符串，同时现有的克隆行为保持不变时，即可视为完成。