wx.getConnectedBluetoothDevices()在三星手机或者Android10之前的手机都无法获取系统已配对已连接的HID设备

wx.onBluetoothDeviceFound(function listener)回调的advertisDataArrayBuffer当前蓝牙设备的广播数据段中的 ManufacturerData 数据段。没有数据这里，但是在App端是有的

iOS端微信使用微信api wx.getBLEMTU获取mtu，  当writeType: 'writeNoResponse'时,mtu只有23.  当writeType: 'write'时,mtu直接就是512.一看就不是正常的mtu值。用iOS原生App获取的mtu是200多 调试基础库：2.27.2 微信版本：Verision 8.0.29 手机平台：iOS端

MiniProgramError openSync:fail exceed max concurrent fd limit Error: openSync:fail exceed max concurrent fd limit at openSync (WAServiceMainContext.js:1:775773) at r.<computed> (WAServiceMainContext.js:1:782337) at Object.r.<computed> (WAServiceMainContext.js:1:782598) at Object.s [as openSync] (WAServiceMainContext.js:1:2239771) at l.<computed> (WAServiceMainContext.js:1:2453420) at W0 (WAServiceMainContext.js:1:2236857) at Function.success (WAServiceMainContext.js:1:2238963) at <api chooseMessageFile success callback function> at Object.success (WAServiceMainContext.js:1:115667) at i (WAServiceMainContext.js:1:755547) 获取聊天文件时，偶现error。导致无法获取文件

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