Simple - Google needed app developers to write for the platform, and phone app developers mostly speak Java. So Google came up with the Dalvik VM that can run recompiled Java code in a compatible environment.

PJ is still backing the site, and keeping an eye on things, but Mark Webbink (from Red Hat's general counsel) is doing the the articles.. and seems to be as impartial as PJ, though not with the same humour (so far, at least).

The articles there go into details about Oracles claims and Googles counters.