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This CL replaces WiFi badges (e.g. captive portal, or secure network) to
new ones. The icons are specific to ash so they are placed in
ash/resources/vector_icons.

TEST=manual
BUG=876218

Change-Id: I48ee6d99fa6c704576c2f40dc9b0bf79cb5d672d
Reviewed-on: https://chromium-review.googlesource.com/1184727
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585741}