Log for each pedestrian the speed within a measurement area.
Note: If two measurement areas M1 and M2 are disjoint
and a pedestrian P1 is located within M1, M2 should
log a speed of -1 for P1.
Watch out: This processor uses the PedestrianVelocityDefaultProcessor internally instead of the
PedestrianTrajectoryProcessor which is used by PedestrianSpeedInAreaProcessorUsingAgentTrajectory.