[embeddingapi][XWALK-2425] Add 2 cases for onReceivedTitle when navigation back

- Failure analysis: When navigation back, the onReceivedTitle won't be triggered.

Impacted tests(approved): new 2, update 1, delete 0
Unit test platform: [Android]
Unit test result summary: pass 2, fail 1, block 0
Merge pull request #959 from zhuyongyong/yongzhu/embeddingAPI/onReceivedTitle

[embeddingapi][XWALK-2425] Add cases for onReceivedTitle