Is this normal for the brick to extend past the concrete slab foundation?
Back in the day, at least my day, the building code allowed for a maximum of a 1" corbel (extention).

I do not see any cracks in the photo that suggests shifting has occurred.

If there is a basement or maybe not, while the foundation is laid, or in the case of concrete, while it is poured, the top of the wall can rack out of square. The break between the lower wall and the upper gives the chance to re-square the walls. This may be a symptom of that.