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

- Add 80 cases about the unit tests for embedding api

Impated TCs num(approved): New 80, Update 0, Delete 0
Unit test platform: [Android]
Android Test result summary: Pass 65, Fail 11, Blocked 4
Failure analysis: 7 cases are failed because the methods of embedding api are not exist.
Others are failed or blocked because the methods of embedding api do not support.