Revert "[SB][Notifs] status_bar_ron_chips flag -> status_bar_not..."

Revert submission 29848583

Reason for revert: b/374191659. The tests suggest that the flag rename caused a performance regression. That seems unlikely, but reverting to see if the regression goes away or not.

Reverted changes: /q/submissionid:29848583

Bug: 374191659
Bug: 364653005

Change-Id: I39578a39ffe65454f25db1e71b4dfc36ed3fd4bb