Add proto fields for new telemetry data

Bug: 916991
Change-Id: Ie7287aeb9c7acc421a82188b0a08dc991343bd76
Reviewed-on: https://chromium-review.googlesource.com/c/1386850
Commit-Queue: Denis Kuznetsov <antrim@chromium.org>
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618237}