You know that America just… does this, right? No bill, no law… In fact it was the first to do this at all. It’s why in crime shows they remove the battery (from phone where you still can, of course.)
It is not legal for police to spy on citizens via their phone cameras in the US…
Still no. Do they do it anyway? Probably, but that doesn’t make it legal.
The movie citizen four did an excellent job detailing different ways a government (in this case the united states) can do this.
It would require a warrant signed by a judge with probable cause.
Wiretap warrants aren’t easy.