An exception is thrown after connection to Sonos speaker

[oleksii-frolov]

Steps to reproduce.
0. Opem Windows.Demo

1. Discover Sonos speaker (it supports DLNA)
2. Click connect button
   Logs:

'ConnectSdk.Demo.Windows.exe' (CLR v4.0.30319: Immersive Application Domain): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Net.Primitives\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Net.Primitives.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
A first chance exception of type 'System.AggregateException' occurred in mscorlib.dll
A first chance exception of type 'System.NotSupportedException' occurred in ConnectSdk.Windows.DLL
'ConnectSdk.Demo.Windows.exe' (CLR v4.0.30319: Immersive Application Domain): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\12.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.DLL'. 

Exception details:

System.NotSupportedException was unhandled by user code
  HResult=-2146233067
  Message=Specified method is not supported.
  Source=ConnectSdk.Windows
  StackTrace:
       at ConnectSdk.Windows.Service.DlnaService.SubscribeVolume(ResponseListener listener)
       at ConnectSdk.Demo.Demo.Model.SetControls()
       at ConnectSdk.Demo.Demo.Model.set_SelectedDevice(ConnectableDevice value)
       at ConnectSdk.Demo.Search.PairOkButton_OnClick(Object sender, RoutedEventArgs e)
  InnerException: 

[sdaemon]

Any "subscribe" functionality in dlnaservice is not yet supported. To avoid crashes I removed the capabilities such that the app will not try to use them