Do not delete ARC container on supervision transition by default.

I plan to cherry-pick this change into M-69.

Bug: 867108
Test: local test
Change-Id: I650f08d70fcd019fb55478b3183fcfce0891dd6c
Reviewed-on: https://chromium-review.googlesource.com/1148143
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Commit-Queue: Bruno Kim Medeiros Cesar <brunokim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578044}
2 files changed