[drawings] Add missing Write_ToBinary2 and Read_FromBinary2 to CExternalData
[drawings] Add missing Write_ToBinary2 and Read_FromBinary2 to CExternalData

ONLYOFFICE/sdkjs,ONLYOFFICE/sdkjs,ONLYOFFICE/sdkjs,ONLYOFFICE/sdkjs,ONLYOFFICE/sdkjs