Do not decode file contents as text

This adds support for extracting binaries, even
if they are completely invalid UTF-16LE text.

TSUnpack/Program.cs

@@ -106,6 +106,12 @@ If any of the files do not exist or if any error occurs while parsing one of the
                         path,
                         destination,
                         e.Message);
+                } catch (UnauthorizedAccessException e) {
+                    Console.WriteLine(
+                        "Failed unpacking APK file at {0} to {1}: {2}",
+                        path,
+                        destination,
+                        e.Message);
                 }
             }
 

TSUnpackLibrary/IO.cs

@@ -104,7 +104,7 @@ namespace TSUnpack {
             string dir = Path.GetDirectoryName(path);
             if (!Directory.Exists(dir))
                 Directory.CreateDirectory(dir);
-            File.WriteAllBytes(path, Encoding.Unicode.GetBytes(apkFile.Content));
+            File.WriteAllBytes(path, apkFile.Content);
         }
     }
 }

TSUnpackLibrary/MstsApk.cs

@@ -87,16 +87,16 @@ namespace Kaitai
             {
                 _fileLen = m_io.ReadU4le();
                 _name = new ApkString(m_io, this, m_root);
-                _content = System.Text.Encoding.GetEncoding("utf-16").GetString(m_io.ReadBytes(FileLen));
+                _content = m_io.ReadBytes(FileLen);
             }
             private uint _fileLen;
             private ApkString _name;
-            private string _content;
+            private byte[] _content;
             private MstsApk m_root;
             private MstsApk m_parent;
             public uint FileLen { get { return _fileLen; } }
             public ApkString Name { get { return _name; } }
-            public string Content { get { return _content; } }
+            public byte[] Content { get { return _content; } }
             public MstsApk M_Root { get { return m_root; } }
             public MstsApk M_Parent { get { return m_parent; } }
         }

TSUnpackLibrary/msts_apk.ksy

@@ -25,7 +25,6 @@ types:
       - id: name
         type: apk_string
       - id: content
-        type: str
         size: file_len
 seq:
   - id: route_display_name