You don't. You have to opt in.

I'm running it on my phone now and the first thing it did was ask "Hey. Is it OK if I do all these things?". It wont run without your permission.

Unlike Apple, Google is pretty good at asking these things.

Edit: Maybe Apple has gotten better. I just remember iTunes wiping my iPhone, iPod and all ID3 tags from my music collection numerous times when I was just supposed to copy/add some files. And that was before you even booted their OS.

Well yes, glad you asked, I am fed up with Apple.