Small tweaks to firewall rules.
Small tweaks to firewall rules.

- No need to write tcp:0-65535, just tcp is fine and shorter.
- Allow ICMP traffic where we also allow TCP or UDP traffic. (cf. http://shouldiblockicmp.com/)
- Allow UDP 80 and 443 in addition to TCP 80 and 443 for HTTP(S) rules for QUIC support.
- Update descriptions to match the rule contents.

Change-Id: Ie6bd9d6e41949f99345d9ef0c52d051770e6307c

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration