It literally does not matter what Teams does - even if Teams maliciously did every wrong thing they possibly can, it's the duty of the phone manufacturer to en

It literally does not matter what Teams does - even if Teams maliciously did every wrong thing they possibly can, it's the duty of the phone manufacturer to ensure that 911 still works, it's Google's duty to ensure that Teams or any other app can't break emergency calls no matter how they try; the law literally requires the phone to recognize that a 911 is being made and override any programming (e.g. Teams) that may interfere with that. If Google can't do that with an over-the-air update, they can issue a full recall for all the affected Pixel phones.