The guys over at XDA-Developers have performed an APK teardown of the latest Google Phone APK (version 22). This is the default telephony app that is used on Google's Nexus and Pixel devices. The latest feature slated for this dialer is a call-screening feature that would keep spam calls from interrupting you. According to the teardown, the Phone app's new feature is called "Call Screen" and it will apparently work without the need for an active WI-Fi or data connection - to do this, it will use a real-time audio transcription of the incoming call to warn you if the call has a robot at...
Source: https://www.gsmarena.com/latest_phone_apk_teardown_reveals_feature_for_screening_robocalls-news-32147.php