Fix GetAvailableLanguageCodes, stub ListAddOnContent and NvGpuAsIoctlRemap (0x4114)

Ryujinx.Core/OsHle/Services/Ns/ServiceNs.cs

@@ -13,7 +13,8 @@ namespace Ryujinx.Core.OsHle.Services.Ns
         {
             m_Commands = new Dictionary<int, ServiceProcessRequest>()
             {
-                { 2, CountAddOnContent }
+                { 2, CountAddOnContent },
+                { 3, ListAddOnContent  }
             };
         }
 
@@ -23,5 +24,14 @@ namespace Ryujinx.Core.OsHle.Services.Ns
 
             return 0;
         }
+
+        public static long ListAddOnContent(ServiceCtx Context)
+        {
+            //TODO: This is supposed to write a u32 array aswell.
+            //It's unknown what it contains.
+            Context.ResponseData.Write(0);
+
+            return 0;
+        }
     }
 }