网络会不定时变化，增加更新网络handle函数

app/src/main/cpp/netcamera/VendorCtrl.h

@@ -28,6 +28,9 @@ public:
     virtual bool HasAuthOnStreaming() const { return false; }
     virtual bool SetResolution(uint8_t channel, uint8_t streamID, uint32_t resX, uint32_t resY) = 0;
 
+
+    void UpdateNetHandle(net_handle_t netHandle) { m_netHandle = netHandle; }
+
 protected:
 
     std::string CvtJSONToString(const Json::Value& data);