Support is added for MPEG-2 extension and user data. With this changes Core returns extension and user data as an extradata. Change-Id: I66a230aa651dabafa883625ce9f687d5c35b8671 Signed-off-by: Shobhit Pandey <cshopan@codeaurora.org> Signed-off-by: Neha Pandey <nehap@codeaurora.org>