Sort apps by package name

[TarasMazepa]

So users will get at least some predictability when they see list of icons :)

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[nickbutcher]

Thanks for the contribution, one small comment.

[TarasMazepa]

sortBy returns Unit. To do this fluently apply should be used :)

[TarasMazepa]

I signed it!

[googlebot]

CLAs look good, thanks!

[TarasMazepa]

Hey, please merge!

[TarasMazepa]

@nickbutcher can you please merge this change?