[usecase-webapi] Improve TypedArray usecase

- Add set and get button, used all type of TypeArray in table.

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: [Tizen-IVI]
Test result summary: Pass 1, Fail 0, Blocked 0
Merge pull request #597 from zhangjingx/zhangjingx/misc/typedarray

[usecase-webapi] Improve TypedArray usecase