- It is doubtful they have been included.
- Those "chosen" left behind no evidence.
- I think it depends on what Thanos was considering when he snapped.
- Either way, we don't know 100% for sure...
At the moment of the snap those "chosen" by the stones to perish were turned to dust temporarily and then left no evidence behind. That is how those unlucky individuals were removed from the universe.
While anything from before the snap (momentum of the car they were driving, their baseball glove they left on the stoop, etc.) still existed, the snap itself erased the individuals as though they never existed at that exact moment. Once the dust fully dissipated there was no evidence of the individual left behind at all.
It is possible the time stone knew those that would have been killed as a result of the snap and calculated those deaths into the 50%, but to be counted among the 50% I feel they should have been "dusted" along with all the others... Feels sloppy to leave behind the bodies if they were counted among the 50%...
I do not remember evidence from the films that shows dead bodies left behind or discussions of the aftermath proving my theory, but that also begs the question of how long after the snap should the ripple spread? For example: What if a someone's caregiver was snapped? Would the person who starves to death days later be counted among the 50% as well? Paralyzed people, babies, etc... Maybe that is why the "snap" took so long. Not just accounting for everyone across the galaxy, but checking their futures as well...
Though that all being said, as I stated in my other answer about Thanos snapping, if he was considering those situations when he snapped, even subconsciously, the stones would have considered his desires and acted accordingly.