Refactoring HOS folder structure (#771)

* Refactoring HOS folder structure

Refactoring HOS folder structure:

- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close #766 and #753).

* Remove Types namespaces

Ryujinx.HLE/HOS/Services/Am/AppletAE/Storage/StorageHelper.cs

@@ -0,0 +1,27 @@
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.Storage
+{
+    class StorageHelper
+    {
+        private const uint LaunchParamsMagic = 0xc79497ca;
+
+        public static byte[] MakeLaunchParams()
+        {
+            // Size needs to be at least 0x88 bytes otherwise application errors.
+            using (MemoryStream ms = new MemoryStream())
+            {
+                BinaryWriter writer = new BinaryWriter(ms);
+
+                ms.SetLength(0x88);
+
+                writer.Write(LaunchParamsMagic);
+                writer.Write(1);  // IsAccountSelected? Only lower 8 bits actually used.
+                writer.Write(1L); // User Id Low (note: User Id needs to be != 0)
+                writer.Write(0L); // User Id High
+
+                return ms.ToArray();
+            }
+        }
+    }
+}