* Stephen Elop the former Microsoft employee (head of the Business Division) and later Nokia CEO with his infamous "Burning Platform" memo: http://en.wikipedia.org/wiki/Stephen_Elop#CEO_of_Nokia
* Some former Nokia employees called it "Elop = hostile takeover of a company for a minimum price through CEO infiltration": http://gizmodo.com/how-nokia-employees-are-reacting-to-the-m...
Maybe they would have had more sales with an Android phone, but I'm not sure it would have made a bit enough difference to prevent this buyout. Elop set Nokia up to be bought out by being a major windows phone maker. It may have been a better long-term bet than Android.
Having said that, I agree with your final point. If you view the whole thing as a setup to extract maximum value via an acquisition, it might make sense. They may have been worth more as a MS acquisition target selling Windows phones than they would have been had they gone down the Android path.
It's entirely possible that neither path would have led to sustainability as a standalone entity.