That's not the reason why there is code written by Nokia employees in the Android source tree (as the article points out, by the way). The reason is that Nokia

That's not the reason why there is code written by Nokia employees in the Android source tree (as the article points out, by the way). The reason is that Nokia has become a significant contributor to the Linux kernel (e.g. UBIFS, drivers for TI SoCs, ...) and some Linux userspace projects (e.g. bluez and D-Bus) following the acquisition of Trolltech (Qt has a significant presence on Linux, obviously) and their Maemo and MeeGo Linux-based mobile operating system efforts. And a lot of that stuff is sitting in the Android source tree, and some of it is also in actual use in Android production system images. OTOH I'm not aware of any Nokia contributions to the Android-exclusive parts of the Android source tree.