That's the icon I was talking about. It was present on my Nexus 5 with Android 6 (marshmallow), but disappeared when I upgraded to android 7 (nougat) and there's no way I can see to bring it back. It's possible that other carriers have it enabled, but google's flagship phones have it disabled.
I can unlock my phone (probably already unlocked anyways), swipe down the status bar and tap an icon to disable location services.
The first time I get a pop up that apps won't be able to use my location and that's it. It won't ask again, and it's a matter of 2 seconds.