Updates IMobileControl interface. Adds VideoCodec.StopSharing() to EndShutdown() method in Vtc1 room

PepperDashEssentials/Room/Types/EssentialsHuddleVtc1Room.cs

@@ -383,6 +383,7 @@ namespace PepperDash.Essentials
         protected override void EndShutdown()
         {
             VideoCodec.EndAllCalls();
+            VideoCodec.StopSharing();
 
             SetDefaultLevels();
 
@@ -652,6 +653,7 @@ namespace PepperDash.Essentials
 				dest.ReleaseRoute();
                 if (dest is IHasPowerControl)
                     (dest as IHasPowerControl).PowerOff();
+
 			}
 			else
 			{