Merge pull request #1097 from chenxix/chenxi/tizen/two-app-extra

[webapi]Modify suite.json to pack this suite into two apps
[misc] Update 3 TCs

Impacted TCs num(approved): New 0, Update 3, Delete 0
Unit test Platform: Android
Android test result summary: Pass 3, Fail 0, Block 0
Merge pull request #1118 from wanghongjuan/misc/stablonglast

[misc] Update 3 TCs
Update one cases to stablonglastplayvideo

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Android
Android test result summary: Pass 1, Fail 0, Block 0
Merge pull request #1120 from wanghongjuan/misc/playvideo

Update one cases to stablonglastplayvideo
[usecase-webapi][XWALK-1736] Add usecase for download usecase

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 0, fail 1, block 0