Fix errors in askuser-notification library

Fix errors in askuser-notification library

* Fix name conflict between askuser-notification service and
  askuser-notification library
* The datagram socket was marked as stream socket.
* The stream socket was marked as datagram socket.
* Change order of calls: updateFd and erase descriptor.
* Add stream socket and datagram socket to askuser-notification.service.

Change-Id: I05d097ba15f038a4f7e88c323ae8790fe7d3eb14