Adding java-samples

I'm unfamiliar with the chromium review process, and from the looks of it, this patch may need to go down that road. The directions mentioned part of the process, but not entirely, so I'll pull here to get going. 

`make server` and selecting java has an error and I'm not sure if thats my issue. From the looks of it pub is not downloading something, but since I'm new on this project, I'm not familiar with the projects context yet. 

I didn't pull the .js files (yet). Not sure if that needs to be done. 

Do you want me to pull using the chromium patch review process? And if so, what are the other steps to get that done?