RpcTimeoutError

**描述问题bug**
几台设备(OPPO R2017/R6007/A31/R3, VIVO Y51A)在测试过程中都遇到RpcTimeoutError报错
1.同一个app下，UI少的界面没问题，UI稍多的界面就会报错
2.同一个UI稍多的界面，用AirtestIDE或者直接poco脚本(简单一句dump)都会报错，用PocoHierarchyViewer怎样刷新都没问题

PS: 把打印打开，看到是socket recv timeout，是safetcp那块有问题？
PS2: 单独打了一个Demo包，已发客服大锅，用VIVO Y51A(文档上看到兼容设备列表有)应该能复现的，看到，主界面dump就会报错，打开第一个Graph界面就不会报错

**报错信息**
```
======================================================================
ERROR: runTest (app.widgets.code_runner.ide_launcher.AirtestIDECase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "airtest\cli\runner.py", line 66, in runTest
File "site-packages\six.py", line 693, in reraise
File "airtest\cli\runner.py", line 62, in runTest
File "C:\Users\Administrator\AppData\Local\Temp\AirtestIDE\Scripts\untitled.air\untitled.py", line 4, in
print(poco.agent.hierarchy.dump())
File "poco\freezeui\hierarchy.py", line 68, in dump
File "poco\utils\simplerpc\utils.py", line 13, in new_func
File "poco\utils\simplerpc\simplerpc.py", line 78, in wait
poco.utils.simplerpc.simplerpc.RpcTimeoutError: (rid=548523b2-54d3-4f8d-bbbf-28aaed86418e)
```

**分别是PS2中两个界面打印的日志**
```
====[POCO] HandleTcpClientAccepted 1
====[POCO] HandleTcpClientAccepted 2
====[POCO] HandleTcpClientAccepted 3
====[POCO] TCP client 127.0.0.1:43482 has connected.
====[POCO] ContinueReadBuffer
====[POCO] HandleDatagramReceived 1
====[POCO] HandleDatagramReceived 2
====[POCO] HandleTcpClientAccepted 4
====[POCO] HandleDatagramReceived numberOfReadBytes 104
====[POCO] HandleDatagramReceived 4
====[POCO] Client : 127.0.0.1:43482 --> 104
====[POCO] ContinueReadBuffer
====[POCO] Update msgs.Count = 1
====[POCO] Update msg = {"method": "Dump", "params": [true], "jsonrpc": "2.0", "id": "76cf54a8-cd37-4ecb-baa3-89e10d5bfa4a"}
====[POCO] Update response = {"jsonrpc":"2.0","id":"76cf54a8-cd37-4ecb-baa3-89e10d5bfa4a","result":{"name":"","payload":{"name":"","type":"Root","visible":true,"pos":[0.0,0.0],"size":[0.0,0.0],"scale":[1.0,1.0],"anchorPoint":[0.5,0.5],"zOrders":{"local":0,"global":0}},"children":[{"name":"[FairyGUI.Timers]","payload":{"name":"[FairyGUI.Timers]","type":"GameObject","visible":true,"pos":[0.0,0.0],"size":[0.0,0.0],"scale":[1.0,1.0],"anchorPoint":[0.0,0.0],"zOrders":{"local":0,"global":0},"clickable":false,"components":["Transform","TimersEngine"],"_ilayer":0,"layer":"Default","_instanceId":-86}},{"name":"Stage","payload":{"name":"Stage","type":"Stage","visible":true,"pos":[0.0,0.0],"size":[0.0,0.0],"scale":[1.0,1.0],"anchorPoint":[0.0,0.0],"zOrders":{"local":0,"global":0},"clickable":false,"components":["Transform","DisplayObjectInfo","StageEngine","UIContentScaler","AudioSource"],"_ilayer":5,"layer":"UI","_instanceId":-72},"children":[{"name":"GRoot","payload":{"name":"GRoot","type":"Root","visible
====[POCO] Update send
====[POCO] Tcp Send datagram.Length = 32926
====[POCO] HandleDatagramReceived 1
====[POCO] HandleDatagramReceived 2
====[POCO] HandleDatagramReceived numberOfReadBytes 0
====[POCO] TCP client 127.0.0.1:43482 has disconnected.
====[POCO] HandleDatagramReceived 3
```

```
====[POCO] HandleTcpClientAccepted 1
====[POCO] HandleTcpClientAccepted 2
====[POCO] HandleTcpClientAccepted 3
====[POCO] TCP client 127.0.0.1:43483 has connected.
====[POCO] ContinueReadBuffer
====[POCO] HandleTcpClientAccepted 4
====[POCO] HandleDatagramReceived 1
====[POCO] HandleDatagramReceived 2
====[POCO] HandleDatagramReceived numberOfReadBytes 104
====[POCO] HandleDatagramReceived 4
====[POCO] Client : 127.0.0.1:43483 --> 104
====[POCO] ContinueReadBuffer
====[POCO] Update msgs.Count = 1
====[POCO] Update msg = {"method": "Dump", "params": [true], "jsonrpc": "2.0", "id": "23ca68e0-bfb1-4b39-9706-e797c9842661"}
====[POCO] Update response = {"jsonrpc":"2.0","id":"23ca68e0-bfb1-4b39-9706-e797c9842661","result":{"name":"","payload":{"name":"","type":"Root","visible":true,"pos":[0.0,0.0],"size":[0.0,0.0],"scale":[1.0,1.0],"anchorPoint":[0.5,0.5],"zOrders":{"local":0,"global":0}},"children":[{"name":"[FairyGUI.TweenManager]","payload":{"name":"[FairyGUI.TweenManager]","type":"GameObject","visible":true,"pos":[0.0,0.0],"size":[0.0,0.0],"scale":[1.0,1.0],"anchorPoint":[0.0,0.0],"zOrders":{"local":0,"global":0},"clickable":false,"components":["Transform","TweenEngine"],"_ilayer":0,"layer":"Default","_instanceId":-1544}},{"name":"[FairyGUI.Timers]","payload":{"name":"[FairyGUI.Timers]","type":"GameObject","visible":true,"pos":[0.0,0.0],"size":[0.0,0.0],"scale":[1.0,1.0],"anchorPoint":[0.0,0.0],"zOrders":{"local":0,"global":0},"clickable":false,"components":["Transform","TimersEngine"],"_ilayer":0,"layer":"Default","_instanceId":-86}},{"name":"Stage","payload":{"name":"Stage","type":"Stage","visible":true,"pos":[
====[POCO] Update send
====[POCO] Tcp Send datagram.Length = 9432
====[POCO] HandleDatagramReceived 1
====[POCO] HandleDatagramReceived 2
====[POCO] HandleDatagramReceived numberOfReadBytes 0
====[POCO] TCP client 127.0.0.1:43483 has disconnected.
====[POCO] HandleDatagramReceived 3
```

**复现代码**
```
# -*- encoding=utf8 -*-
from poco.drivers.unity3d import UnityPoco
poco = UnityPoco()
print(poco.agent.hierarchy.dump())
```

**python 版本:** `python3.6.5`

**poco 版本:** `1.0.70`
**AirtestIDE版本:** `v1.1.0`

**设备:**
- 型号: OPPO R2017/R6007/A31/R3, VIVO Y51A