Overlay permissions needs to be granted in order for react native apps to ran in dev mode

Overlay permissions needs to be granted in order for react native apps to ran in dev mode 直接上图： 1. 允许其出现在其他应用上面 2. 这是因为react native测试包需要获取 悬浮窗权限，进入手机设置页面，找到此APP 打开悬浮窗权限即可

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