[Android] Fix xwalk core library missed Chromium R classes

It's caused by https://crosswalk-project.org/jira/browse/XWALK-1575
The gyp keyword 'all_dependency_settings' doesn't work on the
target 'chromium_generated_java' for variable 'jar_final_path' which
normally is declared in 'build/java.gypi'

Currently, explicitly add the jar from chromium_generated_java into
the list.