FmpDevicePkg/FmpDxe: Add PcdFmpDeviceImageTypeIdGuid

FmpDevicePkg/FmpDxe: Add PcdFmpDeviceImageTypeIdGuid

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1525

Add PCD PcdFmpDeviceImageTypeIdGuid that contains an Image
Type ID GUID value that is used if one is not provided by
FmpDeviceLib. If this PCD is not a valid GUID value,  then
gEfiCallerIdGuid is used.

Update FmpDevicePkg DSC to use PcdFmpDeviceImageTypeIdGuid
as a PatchableInModule PCD.

This content is based on the following commit.

https://github.com/microsoft/mu_tiano_plus/commit/a2c7da88d3a73dbe9b6b75952d6866179c905f28#diff-025d4889f6d3a482b49638a25e432d6d

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Eric Jin <eric.jin@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>