I have Android 7.0 with EMUI 5 - it has built in QR reading, but it's automatic rather than being able to tell it to look for a QR code, which can make getting it to read a bit problematic.
Stock Android still doesn't. I think Samsung also has this through "Bixby Vision"
Basically, why not have a QR code in addition to the URL displayed?
Uggh.. don't get me started on Bixby... it's like a modern day Clippy... "I see you accidentally pressed the hardware button to awaken me the 10th time. how can i take over your screen today?"
Why not just download an app to remap it? I remapped mine to screen rotation lock.