Coming back to this, I was wrong about the details of Arizona law. They require pedestrians to yield to drivers outside of crosswalks, marked or unmarked.
However, I still think Uber violated 28-794.1 and .3.
Notwithstanding the provisions of this chapter every driver of a vehicle shall:
1. Exercise due care to avoid colliding with any pedestrian on any roadway.
2. Give warning by sounding the horn when necessary.
3. Exercise proper precaution on observing a child or a confused or incapacitated person on a roadway.
https://www.azleg.gov/ars/28/00793.htm
However, I still think Uber violated 28-794.1 and .3.
https://www.azleg.gov/ars/28/00794.htm