Fix disposing of IPC sessions server at emulation stop (#2334)

Ryujinx.HLE/HOS/Services/DisposableIpcService.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Threading;
+
+namespace Ryujinx.HLE.HOS.Services
+{
+    abstract class DisposableIpcService : IpcService, IDisposable
+    {
+        private int _disposeState;
+
+        protected abstract void Dispose(bool isDisposing);
+
+        public void Dispose()
+        {
+            if (Interlocked.CompareExchange(ref _disposeState, 1, 0) == 0)
+            {
+                Dispose(true);
+            }
+        }
+    }
+}