[FillRecoveryPwd] Display backup password in KA bar

- Adds the custom logic for Android into the password_suggestion_generator, so that the backup password would be displayed in the KA bar.
- Introduces the icon for the KA bar.

Bug: 417943331
Change-Id: Ic7d5319b3ce01060010b9294ea5ac1149704753a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6976510
Reviewed-by: Sky Malice <skym@chromium.org>
Reviewed-by: Ioana Pandele <ioanap@chromium.org>
Commit-Queue: Anna Tsvirchkova <atsvirchkova@google.com>
Reviewed-by: Christoph Schwering <schwering@google.com>
Cr-Commit-Position: refs/heads/main@{#1519952}