Merge branch 'nanh/VVCSoftware_VTM-M0428-EncDbOpt'

source/App/EncoderApp/EncApp.cpp

source/App/EncoderApp/EncAppCfg.cpp

source/App/EncoderApp/EncAppCfg.h

source/Lib/CommonLib/CodingStructure.cpp

source/Lib/CommonLib/CodingStructure.h

source/Lib/CommonLib/LoopFilter.cpp

source/Lib/CommonLib/LoopFilter.h

source/Lib/CommonLib/TypeDef.h

source/Lib/EncoderLib/EncCfg.h

source/Lib/EncoderLib/EncCu.cpp

source/Lib/EncoderLib/EncCu.h

source/Lib/EncoderLib/EncLib.cpp

source/Lib/EncoderLib/EncModeCtrl.cpp

source/Lib/EncoderLib/IntraSearch.cpp