如此操作必定会复现pocoservice崩溃

**描述问题bug**
pocoservice无限重启

[03:35:42][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner
[03:36:06][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am force-stop com.netease.open.pocoservice ; echo ---$?---
[03:36:09][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am start -n com.netease.open.pocoservice/.TestActivity ; echo ---$?---
[03:36:11][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner
[03:36:34][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am force-stop com.netease.open.pocoservice ; echo ---$?---
[03:36:36][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am start -n com.netease.open.pocoservice/.TestActivity ; echo ---$?---
[03:36:39][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner
[03:36:52][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am force-stop com.netease.open.pocoservice ; echo ---$?---
[03:36:54][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am start -n com.netease.open.pocoservice/.TestActivity ; echo ---$?---
[03:36:56][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner
[03:37:10][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am force-stop com.netease.open.pocoservice ; echo ---$?---
[03:37:12][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am start -n com.netease.open.pocoservice/.TestActivity ; echo ---$?---
[03:37:14][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner
[03:37:38][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am force-stop com.netease.open.pocoservice ; echo ---$?---
[03:37:41][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am start -n com.netease.open.pocoservice/.TestActivity ; echo ---$?---
[03:37:42][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner
[03:38:04][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am force-stop com.netease.open.pocoservice ; echo ---$?---
[03:38:06][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am start -n com.netease.open.pocoservice/.TestActivity ; echo ---$?---
[03:38:08][DEBUG] D:\Python36\lib\site-packages\airtest\core\android\static\adb\windows\adb.exe -P 5037 -s 172.16.3.30:5555 shell am instrument -w -e debug false -e class com.netease.open.pocoservice.InstrumentedTestAsLauncher com.netease.open.pocoservice.test/android.support.test.runner.AndroidJUnitRunner

**复现步骤**
###运行如下代码：

```# -*- encoding=utf8 -*-
__author__ = "Administrator"

from airtest.core.api import *
from poco.drivers.android.uiautomation import AndroidUiautomationPoco
poco = AndroidUiautomationPoco(use_airtest_input=True, screenshot_each_action=False,force_restart=False)

for x in range(99):
print("第{}次打印".format(x))
attempts = 0
success = False
while attempts < 10 and not success:
try:
with poco.freeze() as frozen_poco:
target = frozen_poco
print(target.__len__(),type(target))
success = True
print('加载成功')
except:
attempts += 1
time.sleep(3)
if attempts == 10:
print('超过10次退出')
break
```

**预期效果**
(预期想要得到什么、见到什么)

**相关截图**
(贴出遇到问题时的截图内容，如果有的话)

**python 版本:** `python3.6`

**poco 版本:** `1.0.78`
> poco版本通过`pip freeze`可以命令可以查到

**设备:**
- 型号: 三星note4
- 系统: android 6
- (别的信息)

**其他相关环境信息**
(其他运行环境，例如在linux ubuntu16.04上运行异常，在windows上正常。)