ShellPkg/map: Recognize CDROM change

ShellPkg/map: Recognize CDROM change

The patch adds logic to probe the media change for physical
block devices. So that when media change happens, the BlockIo
is re-installed again.

It fixes the issue when CDROM is removed UEFI Shell still shows
the BlockIo in the output of "map -r".

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>