Update steering wheel LIN message definition

The steering wheel LIN message does not work in low-can after it has
been updated to include commit "Update function rx_filter_can for
multi frame prevision." (59bffa4 in master, a41ee0d in halibut), due
to the length value now being required in the message definition.
The length has been added to the definition for agl-vcar and the
application-generated.cpp files regenerated. As well, the new J1939
and FD flags have been added to the message definition for
consistency.

Bug-AGL: SPEC-2951

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Ice079268827dfbb2bf2c79b6c5e897dcab8fc433