Sometimes camera launched on its own in Samsung Galaxy S7(SM-G930FD)
Your Samsung Galaxy S7 has Quick launch feature that enables device camera by pressing Home key twice. Kindly check whether the Quick launch feature is enabled. For customer convenience, Quick launch feature open camera by pressing the Home key twice in quick succession. Camera may work by pressing Home key regardless of your intent. You can disable Quick launch if you don't need this feature.
Thank you for your feedback!
Please answer all questions.