This may have already been answered but I just noticed it last night. I got my 4.4.2 update and I was messing around and saw this. What is the bagel looking picture?
They are the depictions of the versions of Android.
Cupcake, Donut (the answer to your question) Eclair, Froyo (Frozen Yogurt), Gingerbread, Honeycomb, Ice Cream Sandwich, Jelly Bean, and now Kit Kat.
OK thanks, I knew I had seen the pics before, I identified most of them, but that was first time I saw doughnut rendered like that. I always it it as the pictured in the top right.