public char charAt(int index) {
    if (index == 0) {
      return keyCode;
    }

    return 0;
  }
Representations of pressable keys that aren't text.  These are stored in the Unicode PUA (Private
Use Area) code points, 0xE000-0xF8FF.

@see <a href="http://www.google.com.au/search?&q=unicode+pua&btnG=Search">http://www.google.com.au/search?&q=unicode+pua&btnG=Search</a>
selendroid-server/src/main/java/io/selendroid/server/android/Keys.java