[usecase-webapi] Improve vibration for misc usecase w3c

- Use vibration "on/off" button and button style "center"

Impacted TCs num(designed): New 0, Update 1, Delete 0
Unit test Platform: Tizen M0
Tizen test result summary: Pass 1, Fail 0, Blocked 0
Merge pull request #540 from xinliux/xinliux/usecase/vibration-improve

[usecase-webapi] Improve vibration for misc usecase w3c