Also rename options key from "no_network" to "network" to avoid
too many levels of double-negatives.

Change-Id: I6d29edce8abde64199b27ef0f3453ab370a9937b
Reviewed-on: https://chromium-review.googlesource.com/642516Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47695}