[embedding][XWALK-895] Add new embedding api tests for xwalk

[embedding][XWALK-895] Add new embedding api tests for crosswalk
Impated TCs num:New 80, Update 0, Delete 0 
Unit test platform: android
Android Test result summary:pass 65,Fail 11,Blocked 4
Comments：
7 failed because of not exist.
This case is not necessary, onFullscreenToggled is not designed to be called by embedder to switch fullscreen, it's for embedder to overwrite the behavior when xwalkview wants to get fullscreen.