Reland "[User Education] Clear recent session data when user clears history"

This reverts commit 36a24a7a044d579c537bb6d3fe85e77f9703288e.

Reason for revert: Fixed how prefs were cleared.

Original change's description:
> Revert "[User Education] Clear recent session data when user clears history"
>
> This reverts commit 6415a4e3999d4fe5b0a222ba16ab9e2a13448309.
>
> Reason for revert: Wrong approach was taken, which could lead to
> spurious creation of a service on profile shutdown and (even in the
> best case) cause tests to fail; see attached bug.
>
> Bug: 355249352
>
> Original change's description:
> > [User Education] Clear recent session data when user clears history
> >
> > As requested by privacy review.
> >
> > Exactly what it says on the tin. When the user clears some of their
> > browsing history, the User Education session log (which is used for
> > recording usage telemetry and for triggering certain help bubbles) is
> > fully cleared.
> >
> > Partial clearing is not possible as deleting part of the record would
> > make the data inaccurate.
> >
> > Bug: 349399002
> >
> > Change-Id: Iaafaf07b7ef69bc7ff14afc0daec8196b8bff539
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5734733
> > Commit-Queue: Dana Fried <dfried@chromium.org>
> > Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
> > Reviewed-by: Ayu Ishii <ayui@chromium.org>
> > Reviewed-by: Mariam Ali <alimariam@google.com>
> > Cr-Commit-Position: refs/heads/main@{#1332414}
>
> Bug: 349399002
> Change-Id: I09942395b2e6828cc874f85826163aa3335d279b
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5738606
> Reviewed-by: Ayu Ishii <ayui@chromium.org>
> Reviewed-by: Alison Gale <agale@chromium.org>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Auto-Submit: Dana Fried <dfried@chromium.org>
> Commit-Queue: Ayu Ishii <ayui@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1332543}

Bug: 355249352
Bug: 349399002
Change-Id: Id2806897be3e4f296777e3abb944538d8855a0d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5739196
Auto-Submit: Dana Fried <dfried@chromium.org>
Reviewed-by: Ayu Ishii <ayui@chromium.org>
Reviewed-by: Mariam Ali <alimariam@google.com>
Commit-Queue: Mariam Ali <alimariam@google.com>
Cr-Commit-Position: refs/heads/main@{#1333466}