Data sharing: open tab group on toast manage button

When user receives a toast of other member joining the group. The group
may be closed. This CL tries to open the group with the browser of the
current toast before open the manage dialog.

Bug: 390794520
Change-Id: Iaa7a1d02b4f087957bcef3cc2e959a0823c38ea2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6243269
Reviewed-by: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: Darryl James <dljames@chromium.org>
Commit-Queue: Yuheng Huang <yuhengh@chromium.org>
Reviewed-by: Alison Gale <agale@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1418431}