don’t add the tab to tab state until the tab_helper has updated the v…

[bridiver]

…alues

fix #9506 along with brave/muon@4189da5
change is backwards compatible and muon commit is not required for merging

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.

Test Plan:
Difficult to add an automated test because the timing is critical. Steps outlined in related issue

Reviewer Checklist:

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[darkdh]

++