[UNO-d] Add corresponding text in profile menu for sync identity pill

It updates a sync description (and button label) to corresponding
strings in the Profile Menu whenever the menu is opened from the history
sync opt-in identity pill. The profile menu strings correspond to the
pill strings.

Bug: 415748973
Change-Id: I996525bf56657c41f548655a2f23047ae5e6b997
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6513036
Commit-Queue: Ernest Nguyen Hung <ernn@google.com>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1456857}