You mean: http://i48.tinypic.com/14scxdw.jpg
The URL you gave is for some sort of toolbox or setup screen and
doesn't show your actual image.
You mean: http://i47.tinypic.com/afc1er.jpg
And I never got that page or anything resembling it. I can't account
for why you got it and I didn't, but I would have remembered that
page. There's just no way I would have clicked Finish on such a page
without reading it, because I knew Avast had a history of foisting
Google on us and I was hyper-alert during the update.
Maybe there are several versions of the updater, bizarre though that
seems. Paul reported that the Avast forum reports some screen
appearing with the option to uncheck Google, but disappearing too
quickly for anyone to exercise that option.