MdeModulePkg/MdeModulePkg.dec: Add capsule related definition.

MdeModulePkg/MdeModulePkg.dec: Add capsule related definition.

1) Add capsule related library.
   FmpAuthenticationLib
2) Add capsule related status code PCD.
   PcdStatusCodeSubClassCapsule
   PcdCapsuleStatusCodeProcessCapsulesBegin
   PcdCapsuleStatusCodeProcessCapsulesEnd
   PcdCapsuleStatusCodeUpdatingFirmware
   PcdCapsuleStatusCodeUpdateFirmwareSuccess
   PcdCapsuleStatusCodeUpdateFirmwareFailed
   PcdCapsuleStatusCodeResettingSystem
3) Add capsule status variable PCD - CapsuleMax value.
   PcdCapsuleMax
4) Add system FMP indicator PCD - used by ESRT.
   PcdSystemFmpCapsuleImageTypeIdGuid
5) Add PcdTestKeyUsed PCD.
This PCD can be set by platform to indicate if there is any
test key used in current BIOS, such as recovery key,
or capsule update key.
Then the generic UI may consume this PCD to show warning information.
Other platform driver may also consume this PCD to know such info,
and report it via platform specific way.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>