Certain io.file.* and bluetooth.* classes and interfaces are absent

[AShiningRay]

Turns out i didn't make an issue for PR #145 (and neither the previous one about audio), sorry.

Making them now to document things a bit better:

Some games like 3D Formula Extreeme! depend on a few bluetooth classes that are currently missing from FreeJ2ME, and stubbing them seems to solve the problems, while allowing further implementation when/if needed. Some of those classes also rely on the obex ones, so they also need to be added to the source code.

Furthermore, i have a 320x240 version of Asphalt Nitro that relies on io.FileConnect in order to work. This one, and a few other microedition.io.* files were also nowhere to be found in FreeJ2ME.