[webapi][XWALK-1871] Replace picture URL in presentation

-Old pictrue URL now is invalid, so replace it.

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Android
Android test result summary: Pass 1, Fail 0, Blocked 0
Merge pull request #340 from xinliux/xinliux/webapi/xwalk-1871

[webapi][XWALK-1871] Replace picture URL in presentation