They are early Christmas presents from Google to technology reporters and bloggers eager to swallow up any news regarding the tech giant: tweeted weekend photos of Mountain View, Calif., employees testing an experimental Android phone of Google’s own design. The photos, together with a Google blog post confirming that select employees around the world were putting a “mobile lab” through its paces, set off a round of speculation that the phone may be coming in early 2010, and that it might be an unlocked offering sold directly to consumers.