Siri came out about 9 months ago and now Google releases basically the same thing? For Google to take 9 months to develop and release something that relates directly to search points to either they are idiots for missing something so obvious or they copied.
The search box in question has been there since Android 1.0. The patent Apple is using is not a Siri patent, it's a Spotlight patent from 1999. You sir are confused on the issues here.
Apple argued that Siri, using their patented spotlight technology from 1999, was the reason people bought the iPhone 4S, and that Android's search box, available since day 1 in 2008, infringes that patent by searching both locally and on the web and thus the Galaxy Nexus steals sales of the iPhone 4S with Siri because it offers this "Search box" functionality.
Yes, Apple really argued that people opted for a Search box instead of Siri to get the injunction.