Page writes: “Having exceeded even the crazy ambitious goals we dreamed of for Android—and with a really strong leadership team in place—Andy’s decided it’s time to hand over the reins and start a new chapter at Google. Andy, more moonshots please!” [1]
The "more moonshots" implies that Android was itself a moonshot. Whether it was declared one at the time Android Inc was purchased I don't know!
As for financial success, in a recent lawsuit with Oracle it was disclosed Android had a profit of $22 billion [2] if I'm reading into it right (admittedly very quick research, not at all reliable!)
[1] https://techcrunch.com/2013/03/13/andy-rubins-next-moonshot-...
[2] http://www.bloomberg.com/news/articles/2016-01-21/google-s-a...