[usecase-webapi] Update usecase for gamepad.

Impacted TCs num: New 0, Update 1, Delete 0
Unit test Platform: Andriod
Unit test result summary: Pass 1, Fail 0, Blocked 0
Merge pull request #1023 from JianfengXu/Crosswalk-8

[Crosswalk-8][usecase-webapi] Update usecase for gamepad.