SecurityPkg: Add new modules to Security package.

SecurityPkg: Add new modules to Security package.

This commits adds modules and dependencies  related
to initialization and usage of default Secure Boot
 key variables to SecurityPkg.

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
Reviewed-by: Sunny Wang <sunny.wang@arm.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Pete Batard <pete@akeo.ie>
Tested-by: Pete Batard <pete@akeo.ie> # on Raspberry Pi 4