Answer: No if the frictional forces are internal to the system.
Step-by-step explanation:
If the system has no external acting on it as the frictional forces are internal (frictional force produced by body one acting on on body two, and frictional force produced by body two acting on on body one) then the linear momentum is conserved.
However if the frictional force is external to the two body system then the linear momentum of the two body system will not be conserved.