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Add primary account description with a link pointing to Sync Settings.
Show management status for supervised users.

Screenshots: http://screen/8FKJx5YBtEY4X6Y,
http://screen/5EWijZQ5sCaUJMf (managed account),
http://screen/63ivfWWtMvpKn8D (child account)

Bug: 1144113
Change-Id: I15cb13ac6763882e671ac57c13bd81825b61a8c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2549763
Commit-Queue: Anastasiia N <anastasiian@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832305}