Update am service (#98)

* am services implementations

Implement:
- IAllSystemAppletProxiesService
- IApplicationCreator
- IGlobalStateController
- IHomeMenuFunctions
  * RequestToGetForeground stub.
  * GetPopFromGeneralChannelEvent stub event.
- ISystemAppletProxy
  * GetCommonStateGetter
  * GetSelfController
  * GetWindowController
  * GetAudioController
  * GetDisplayController
  * GetLibraryAppletCreator
  * GetHomeMenuFunctions
  * GetGlobalStateController
  * GetApplicationCreator
  * GetDebugFunctions

* Update ServiceFactory.cs

* Update IHomeMenuFunctions.cs

* Update IHomeMenuFunctions.cs

* Update ServiceFactory.cs

Ryujinx.Core/OsHle/Services/Am/IGlobalStateController.cs

@@ -0,0 +1,20 @@
+using Ryujinx.Core.OsHle.Ipc;
+using System.Collections.Generic;
+
+namespace Ryujinx.Core.OsHle.Services.Am
+{
+    class IGlobalStateController : IpcService
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        public IGlobalStateController()
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                //...
+            };
+        }
+    }
+}