[129][Compare] Remove punctuation from offline toast message

Strings are marked non-translatable.

(cherry picked from commit 3b31cfe9)

Bug: 362717115
Change-Id: If838ef09645b3d04b1f280a267bc2b0ee3c92167
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5824328


Auto-Submit: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Yue Zhang <yuezhanggg@chromium.org>
Commit-Queue: Yue Zhang <yuezhanggg@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1348740}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5837422
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/branch-heads/6668@{#1070}
Cr-Branched-From: 05bc6649-refs/heads/main@{#1343869}