[Android] Fix white screen issue when load http.html with manifest.

Correct the judgment of url schemes in xwalk_content.cc.

BUG=https://crosswalk-project.org/jira/browse/XWALK-985
Bump version to 6.34.107.0
Merge pull request #1735 from gaochun/bug985

[Android] Fix white screen issue when load http.html with manifest.