Are you fond of the custom navigation gestures on your Android phone? You might have to go digging for them in the future. The 9to5Google team says it has obtained the latest Google Mobile Services agreement for device makers, and the terms reportedly require that phones ship using either Android 10's new gestures or the old three-button layout. Third-party gestures can stay, but they have to be hidden at least one level below in the Settings app. Vendors not only can't enable their own gestures by default, they can't even be advertised in the setup process or by a notification.