[Refactor] Rename tab switcher top toolbar to not be phone specific

Bug: 1286780
Change-Id: Icdd39cd270055c540ed5e3f45d5b1de5b64822b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3387695


Reviewed-by: Wenyu Fu <wenyufu@chromium.org>
Reviewed-by: Neil Coronado <nemco@google.com>
Reviewed-by: Theresa Sullivan <twellington@chromium.org>
Commit-Queue: Sirisha Kavuluru <skavuluru@google.com>
Cr-Commit-Position: refs/heads/main@{#959302}