Pixel 2: I often miss important calls because ringer is turned off. I am not doing this on purpose. Sometimes it goes to airplane mode and sometimes ringer is just turned off. Under Sound there is a "shortcut to prevent ringing" that says press power and volume up keys at the same time. I mostly carry the phone in my back pocket and I suspect that is how the ringer is getting turned off. I would like to disable this feature but how?