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This CL:
* Introduces NetworkTypePattern::operator| which makes some code a bit
  more intuitive (and reduces overhead).
* Add Physical() for enabling/disabling physical networks during OOBE.
  This reduces log spam on linux and potentially avoids unexpected
  behavior on devices (but the current behavior is probably harmless).

Bug: 756092
Change-Id: Ie27d02fd03875c1bb44e61510acd5179b672bd14
Reviewed-on: https://chromium-review.googlesource.com/828264Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524279}