RedfishPkg: Add RedfishHostInterfaceDxe to RedfishPkg
    
    Add RedfishHostInterfaceDxe and PlatformHostInterfaceLibNull to Redfish
    package.
    
    Signed-off-by: Abner Chang <abner.chang@hpe.com>
    
    Cc: Jiaxin Wu <jiaxin.wu@intel.com>
    Cc: Siyuan Fu <siyuan.fu@intel.com>
    Cc: Fan Wang <fan.wang@intel.com>
    Cc: Jiewen Yao <jiewen.yao@intel.com>
    Cc: Nickle Wang <nickle.wang@hpe.com>
    Reviewed-by: Nickle Wang <nickle.wang@hpe.com>