wfd : Making changes for Audio Server

      Adding Audio Server in allowed list
      to enable reading from proxy.With
      OS upgrade now audio has its own
      process and hence we are adding
      rules for same. As this removes
      uses of mediaserver process , so
      we are removing it and  adding
      audio server process.

CRs-Fixed: 1013040
Change-Id: I4ffc4917f9d39b0199f4c4b9a3ba64bd67acf466