Show glic window in attached state only for normal browsers

Triggering the hotkey while a non-normal browser is active tries to
open the glic window in the attached state. However, this hits a CHECK
because the glic button isn't available to attach on non-normal
browsers. This CL fixes this case by opening the glic window in the
detached state instead.

Fixed: 396240586
Change-Id: I7cdb49ffb74f474b357409abf8c2afaa6f329fa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6262743
Reviewed-by: Ian Wells <iwells@chromium.org>
Commit-Queue: Eshwar Stalin <estalin@chromium.org>
Reviewed-by: Eshwar Stalin <estalin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1420193}