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/Android/Parcel.cs

@@ -0,0 +1,58 @@
+using System;
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Services.Android
+{
+    static class Parcel
+    {
+        public static byte[] GetParcelData(byte[] parcel)
+        {
+            if (parcel == null)
+            {
+                throw new ArgumentNullException(nameof(parcel));
+            }
+
+            using (MemoryStream ms = new MemoryStream(parcel))
+            {
+                BinaryReader reader = new BinaryReader(ms);
+
+                int dataSize   = reader.ReadInt32();
+                int dataOffset = reader.ReadInt32();
+                int objsSize   = reader.ReadInt32();
+                int objsOffset = reader.ReadInt32();
+
+                ms.Seek(dataOffset - 0x10, SeekOrigin.Current);
+
+                return reader.ReadBytes(dataSize);
+            }
+        }
+
+        public static byte[] MakeParcel(byte[] data, byte[] objs)
+        {
+            if (data == null)
+            {
+                throw new ArgumentNullException(nameof(data));
+            }
+
+            if (objs == null)
+            {
+                throw new ArgumentNullException(nameof(objs));
+            }
+
+            using (MemoryStream ms = new MemoryStream())
+            {
+                BinaryWriter writer = new BinaryWriter(ms);
+
+                writer.Write(data.Length);
+                writer.Write(0x10);
+                writer.Write(objs.Length);
+                writer.Write(data.Length + 0x10);
+
+                writer.Write(data);
+                writer.Write(objs);
+
+                return ms.ToArray();
+            }
+        }
+    }
+}