AirtestIDE无法连接到小米Mix 2s

**问题分类**
* 测试开发环境AirtestIDE使用问题

**描述问题bug**
AirtestIDE无法连接到小米Mix 2s

**复现步骤**
1. 通过数据线连接小米Mix 2s到电脑
2. 点击AirtestIDE上的“refresh ADB”按钮，确认连接的手机出现在设备列表中
3. 点击设备右侧的“connect”按钮

**预期效果**
成功连接到手机，Devices窗口与手机页面同步

**结果**
AirtestIDE报错，无法连接到手机
操作日志如下：
```
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 wait-for-device
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell getprop ro.build.version.sdk
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell ls /data/local/tmp/minicap
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell ls /data/local/tmp/minicap.so
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell LD_LIBRARY_PATH=/data/local/tmp /data/local/tmp/minicap -v 2>&1
version:5
skip install minicap
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell LD_LIBRARY_PATH=/data/local/tmp /data/local/tmp/minicap -i
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell pm path jp.co.cyberagent.stf.rotationwatcher
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell export CLASSPATH=/data/app/jp.co.cyberagent.stf.rotationwatcher-bIx9OLvh2kMmiTGWSuwGoA==/base.apk;exec app_process /system/bin jp.co.cyberagent.stf.rotationwatcher.RotationWatcher
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 forward --no-rebind tcp:16583 localabstract:minicap_16583
/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/android/static/adb/mac/adb -P 5037 -s 3d757927 shell LD_LIBRARY_PATH=/data/local/tmp /data/local/tmp/minicap -i
Failed to execute ADB commands, please read [Docs](http://airtest.netease.com/docs/en/3_faq/android_connection.html)

```

**python 版本:** `python3.6`

**操作系统:** `macOS 10.14.5`

**设备:**
- 型号: [小米Mix 2s]
- 系统: [Android 9]
- MIUI 版本: [MIUI 10 9.7.4开发版]

**其他相关环境信息**
(在Windows 10 上同样遇到此问题。)