MdeModulePkg/SmmCorePerformanceLib:Track FPDT record in SMM phase

MdeModulePkg/SmmCorePerformanceLib:Track FPDT record in SMM phase

V3:
a. Handle the case when string is empty in String Record.
b. Use gEdkiiFpdtExtendedFirmwarePerformanceGuid to report status
code.
c. Refine the code logic.

V2:
Update SmmCorePerformanceLib to report the buffer address of
boot performance records instead of records contents.

Updated to convert Pref entry to FPDT record in SMM phase and then
export records to FPDT table.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>