[Page info bottom sheet] Add new bottom sheet for feedback

This CL adds a new bottom sheet for providing feedback on the
page info sharing flow. It will be integrated with the existing
flow in a follow-up CL.

Bug: b/326445889
Change-Id: I74644da404771ce9dd2df9237f6dcd02c9b49609
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5411230


Reviewed-by: Wenyu Fu <wenyufu@chromium.org>
Commit-Queue: Salvador Guerrero Ramos <salg@google.com>
Cr-Commit-Position: refs/heads/main@{#1282233}