[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.

BUG=https://crosswalk-project.org/jira/browse/XWALK-690
Merge pull request #1601 from wuhengzhi/multi_icon

[Android] Support multiple icons for packaging tool.
[Android] Improve error messages for runtime and packaging tool

Fix https://crosswalk-project.org/jira/browse/XWALK-1283 issue 2.
Show x86/arm architectures after building. like below:
This APK will only work on x86/arm based android devices"