The feature accidentally was discovered in the main Assistant settings under “Guacamole” where it says “Skip saying Hey Google” for help with quick tasks. For example, you can cancel a ringing alarm by saying “Stop,” or “Snooze.” Handling an incoming call is as easy as saying “Answer/Decline the call” without having to say “Hey Google.”
These settings were not meant to be viewed by non-Googlers
Google was testing Guacamole internally and the Assistant menu that accompanies this story was not meant for viewing by non-Googlers. A toggle switch can be used to enable the feature under Voice shortcuts.