I disagree with your senerio. If I say, OK Google, then I'm giving that app permission to do what's it's supposed to. Each time I use what ever feature, I'm giving it permission to operate. The permission description indicates that it's being done without your consent. That is completely different.And if the app (like Chrome) needed your confirmation every time you wanted to use 'Ok google' or use something like Goggles to snap a QR code, there'd be a huge uproar about how Android is unusable because of pop up dialogues for every action (just like what happened with Vista). Honestly, there's no huge conspiracy here. It's just how the apps need the phone devices (like the mic or camera) to do their jobs.
I'm not sure a smartphone (any smartphone) is right for you if you're that concerned about permissions that are necessary to make apps actually do what they're advertised to do. Maybe a different type of phone might be better.
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