Both. I also use ((((Developer Mode)))) to block the microphone, but I don't believe that it actually does anything.
I was listening to music the other day, and when I went to pause it, I saw that little green dot in the corner that Androids display when the camera or microphone is being accessed. Of course, the moment I picked my phone up, it quickly went away, almost as if I had caught someone in their blatant act of spying.
If feds are watching me, there's a good chance they could be watching you too.