Revert "[Tab Group] Refactor show/hide code for bottom tab strip"

This reverts commit 47b7b38aea9bcbcd91748e1952b0142121614ed7.

Reason for revert: TabGroupsTest#testTabGroupModelFilterObserverUndoClosure is failing on builder "android-arm-tests": http://b/382401210

Original change's description:
> [Tab Group] Refactor show/hide code for bottom tab strip
>
> Significantly refactor/simplify tab group bottom strip show/hide logic.
> The previous implementation tried to special case every observer event.
> This new approach is much simpler. On any update event we run the same
> logic.
>
> Steps:
> 1) Check if we can show, there are several reasons this UI can be
>    suppressed. If it is suppressed we hide if not already hidden.
> 2) If the current tab's tab group ID matches the ID we used last
>    time we do nothing. Otherwise we perform an update to either show the
>    new group (if non-null tab group ID) or hide.
>
> State tracking is limited to the last known tab group ID which is more
> descriptive than a boolean. This approach would not have been possible
> with the non-stable root IDs used previously.
>
> Fixed: 380920457
> Change-Id: I3b890e9aa93f24fd869a3f48d3256a3716a7e711
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6069911
> Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
> Reviewed-by: Sky Malice <skym@chromium.org>
> Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1391890}

Bug: 380920457, 382401210
Change-Id: I631fe4eaafa1dcaff0069c810256ae8e55ed6312
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6072606
Auto-Submit: Kartar Singh <kartarsingh@google.com>
Owners-Override: Kartar Singh <kartarsingh@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1392117}