What term of the GPL or other OpenJDK distribution would require them to use the whole thing?
Adding a few lines, or even just saying "we peeked at OpenJDK as a model, so Dalvik is a derivative work" means they'd be relying on the OpenJDK's GPL, and relicensing Dalvik as GPL as well. At that point, OpenJDK patent grants (either explicit or implied) could make further alleged infringement moot.
Adding a few lines, or even just saying "we peeked at OpenJDK as a model, so Dalvik is a derivative work" means they'd be relying on the OpenJDK's GPL, and relicensing Dalvik as GPL as well. At that point, OpenJDK patent grants (either explicit or implied) could make further alleged infringement moot.