Vibration brick

https://jenkins.catrob.at/view/All-Categories/view/Catroid/job/Catroid-Multi-Job-Custom-Branch/1541/

- checkstyle warnings regarding the import orders should be fixed.
- the 2 lint warnings can be ignored, since there is no other way to support API levels 10 to 19). It executes without errors on Galaxy Nexus under API 10 and on Nexus4, API 18
- FindBugs Warnings both say, there might be a problem only if there are multiple threads started. Only one Thread is started by the mentioned funtions. 

please write a comment, if you know how to fix these warnings