The idea is, if none of
- timestamp,
- object_count,
- bytes_used,
- state, or
- epoch
has changed, we shouldn't need to send an update back to the root
container.
This is more-or-less comparable to what the container-updater does to
avoid unnecessary writes to the account.
Closes-Bug: #1834097
Change-Id: I1ee7ba5eae3c508064714c4deb4f7c6bbbfa32af