Add a new "Feature" class as parent to Filtering, HeaderInsertion,
RoutingDriverWrapper and future feature classes.
This class is implementing duplicated prototypes,
constructor and destructor methods.
Change-Id: I65b44b163393472eb60f1ca653520a8c8d3cb710
Signed-off-by: Ilia Lin <quic_ilial@quicinc.com>
