MdeModulePkg/BdsDxe: Support Capsule On Disk.

MdeModulePkg/BdsDxe: Support Capsule On Disk.

https://github.com/tianocore/tianocore.github.io/wiki/UEFI-Capsule-
on-Disk-Introducation

Set EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED bit of
"OsIndicationsSupported" variable to indicate the Capsule On
Disk is supported or not, according to PcdCapsuleOnDiskSupport.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Chao B Zhang <chao.b.zhang@intel.com>
Signed-off-by: Wei6 Xu <wei6.xu@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Chao B Zhang <chao.b.zhang@intel.com>