GitLab

Extend update_engine's histograms till end of 2021

Also move the ownership from senj@ to ahassani@ and
chromeos-core-services@

BUG=1089610
TEST=None

Change-Id: I7db9e20dd0dc1a595d11884cc49bbde078993707
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2250711
Auto-Submit: Amin Hassani <ahassani@chromium.org>
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#783781}