Reuters writes (stock tickers removed):

<<British chip designer ARM will demonstrate a prototype of Google Inc's Android mobile phone platform in action next week at the world's biggest wireless fair, a source close to the company said.

It was not immediately clear on Thursday what the working model that ARM plans to show at Mobile World Congress in Barcelona would look like or who would supply the parts.>>
http://www.reuters.com/article/technologyNews/idUSWEB442320080207