Can Google/Apple/et al be held liable if demonstrated that any criminal used maps in prep for any crime?

Highly unlikely (but hey, anything's possible when you're flirting with an authoritarian regime). They would need to demonstrate that the map was made TO destroy cameras if to have real merit.

In my uninformed opinion that would be a dangerous precedent if there is no proven collusion or conspiracy to act together. I anal though so I'll wait for people who know the law to respond.