Android: 运行超过10mins时，Socket hang up

* **Macaca Version**:
macaca-cli@2.0.12
* **Macaca Doctor Logs**:
```
macaca-doctor version: 2.0.3

Node.js checklist:

node env: /usr/local/bin/node
node version: v6.10.0

iOS checklist:

Xcode Command Line Tools is ready, version: 2347.
xcodebuild version: 8.3.3
iproxy[usbmuxd] is installed at: `/usr/local/bin/iproxy`
ios_webkit_debug_proxy is installed at: `/usr/local/bin/ios_webkit_debug_proxy`
carthage is installed, version: 0.23.0

Android checklist:

JAVA version is `1.8.0_121`
JAVA_HOME is set to `/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home`
ANDROID_HOME is set to `/Users/bx/Library/Android/sdk`
Platforms is set to `/Users/bx/Library/Android/sdk/platforms/android-25`
ADB tool is set to `/Users/bx/Library/Android/sdk/platform-tools/adb`
gradle is installed, version: 3.5

Installed driver list:

android: 2.0.40
chrome: 1.0.7
electron: 1.1.14
ios: 2.0.27
```
* **Operate System**:
MAC 10.12.5
* **DEVICE OS**:
Android 6.0
* **Programming Language**:
JAVA

>> proxy.js:63:22 [master] pid:15435 UIAutomatorWD client proxy error with: Error: socket hang up