shill: Add arcvpn properties

Add the properties used by the new "arcvpn" driver.  Also, consolidate
the "orphaned" IPConfig properties into the main IPConfig section of
the file.

BUG=chromium:696865
TEST=none

Change-Id: I4ac120f9746b3d70009dd31be5321806c4824bb1
Reviewed-on: https://chromium-review.googlesource.com/573622
Commit-Ready: Kevin Cernekee <cernekee@chromium.org>
Tested-by: Kevin Cernekee <cernekee@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Abhishek Bhardwaj <abhishekbh@google.com>
1 file changed