[Android] Enable the immersive fullscreen with manifest.

The fullscreen setting in manifest doesn't work with Android 4.4,
this is because there is no way to declare immersive mode in the
manifest or window flags. This fix resolves this issue by checking
the manifest fullscreen setting via manifest parser and calling the
corresponding functions of setting the immersive fullscreen mode.
In addition, the command-line parameter of immersive fullscreen
mode is also supported for packaging tool.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1200
(cherry picked from commit 35a3c9ae41b9e86c749caf8457a4cde3545fe916)
Merge pull request #1820 from ShDavidliu/fullscreen

[Android] Enable the immersive fullscreen with manifest.