MdePkg: Add UDF volume structure definitions

MdePkg: Add UDF volume structure definitions

This patch adds basic volume structure definitions necessary to identify
a valid UDF file system on a block device, as specified by OSTA
Universal Disk Format Specification 2.60.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>