Software Updater is an integral part of Antivirus program, even the Free version, but that doesn't have Automatic Update function (you have to have it do it manually).
As an Avast Free user, I don't know if the Driver Updater is included with Avast Ultimate, but I would have thought it should be, if the term Ultimate is to be considered the Ultimate choice. When it has the Avast Secure VPN, Avast Cleanup Premium and AntiTrack.
What I don't know is if there is a payment option for 3 systems as it only shows 1 system and 10 systems
https://support.avast.com/en-ww/ and type Ultimate that gives more details.
Personally I have never been one to automatically Update Drivers, without a very good reason, known vulnerability or serious bug. Updating drivers can have a very serious and possible impact on your system.