You probably aren’t quite aware of this when you bought the phone you’re using and happily uploaded all those images, but apparently, Android OS - and basically all the operating systems out there (yes, including iOS) - all have the ability to access locally stored photos on your devices. Hmm.
It’s not a security hole so complaint letters won’t work. Most operating systems, including Windows, OSX, Mac, PC, all have this function themselves as well. It’s not exactly true that they will use it for any bad intention (why would they anyways?), though there’s no guarantee that these photos will forever hold their peace in your phone.
Just a heads up.