HUN: Implement per-package config.

- Keep track of whether or not HUNs are allowed per-package.
- No impact on ranking, purely presentational.
- Simplify RankingHelper with a package table.
- Improve RankingHelper dump.
- Fix some warnings and typos.

Bug: 19776495
Change-Id: I28d69df69b576f4eabbb528eabecb1f736f0e830
7 files changed