Ah, yeah. For pictures that aren't yours, you'll see search, location (if available), tags (if available), and the menu button up top. Tapping the menu button for pictures that aren't on their account would only yield the options to Save to phone (if privacy settings allow it), share external (ditto on the privacy settings), and give feedback/report photo.
If the picture is uploaded by their account, then the menu button will show a bunch more options like Make profile picture, edit caption, and delete photo. If they don't have these options, chances are the picture isn't theirs and only the account that uploaded it can modify it.
Also, FB app is the same across Android devices, so that shouldn't be a problem.