Samsung doesn't have a hope in hell. They already tried that in The Netherlands and the judge wouldn't allow it. Samsung tried using FRAND patents and that didn't work. Not sure why they think it'll work in Australia or Japan. Apple is winning the war so far with most decisions going their way (including another one today involving HTC).
As to why they don't go after Google, why would they? Same reason Microsoft isn't going after Google - because they don't sell anything - Android is free. So MS goes after companies and gets them to pay licensing fees instead. Big, bad Samsung even admitted that "we can't expect Google to deal with Android IP issues" (their quote, not mine) so they agreed to license IP from Microsoft.
Apple claims Android infringes their IP (so far courts are agreeing). MS says Android infringes their IP - MS is making way more money off licensing to Samsung, HTC and others than it does off it's own OS. Oracle claims Google infringes their IP. See the pattern here?
Do people actually believe these companies are all to get Google and Google has done nothing wrong? Rose colored glasses, I think. Or Google goggles if you prefer.