Parser - sei message (#30)

* sei mesaage aprser

* sei callback fn

* copy payload and add condition for callback

* compile error fix

* review comments

* review  comment

src/parser/roc_video_parser.h

@@ -57,6 +57,7 @@ protected:
     bool new_sps_activated_;
 
     RocdecVideoFormat video_format_params_;
+    RocdecSeiMessageInfo sei_message_info_params_;
 };
 
 enum ParserSeekOrigin {