[Android] Support multiple icons for packaging tool.

This patch is to implement the feature about multiple icons for
packaging tool.
The icon size in manifest.json was defined by web developer, we
won't be able to predict the size, so we use interval to estimate
the icon size.
Now we use function call to pass the parameter, next step the
way of command line will be depredated, so the code in customize.py
and make_apk.py will be reconstructed.

BUG=https://crosswalk-project.org/jira/browse/XWALK-690