I'm using a OnePlus 6 (Magisk; systemless Xposed, stock ROM at Android 8.1.0). One of the features that constantly irritates me is the accidental dialing of emergency number. The system by-default looks for triple power button tap and automatically dials Emergency number (112). I read on XDA here that this is a feature specific to India and Indian SIMs, and I also bought this in India and use an Indian SIM. Other regional users, per some threads of OnePlus subreddit and OnePlus forums, do not have this problem and can customize the shortcut from Camera app or under Settings app, while I cannot.
I found this YouTube video but the recommended solution does not work because the Emergency Info app in my system doesn't have the activity used in the video. That app only has these two activities which only leads to editing Emergency specific user details:
How do I change this behavior? I'm looking to prevent emergency number dial on triple power button tap, and if possible, customization of that double power button tap to Camera launch. Furthermore, if possible, please provide a non-root based solution.