Reland "[privacy sandbox settings] Add tests for the new notice"

This is a reland of commit 397a6861840f069586ab95e1247e372cd6d758a1

Original change's description:
> [privacy sandbox settings] Add tests for the new notice
>
> Add dialog pixel test and browser tests covering all notice prompt
> actions.
>
> Bug: 1321587
> Change-Id: Ib060212eec145a7c70f5e223de6d085ef0930671
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3637851
> Commit-Queue: Olesia Marukhno <olesiamarukhno@google.com>
> Reviewed-by: Theodore Olsauskas-Warren <sauski@google.com>
> Cr-Commit-Position: refs/heads/main@{#1002677}

Bug: 1321587
Change-Id: I42490d1e4b375b6229066eb203022e31203278fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3644737
Reviewed-by: Theodore Olsauskas-Warren <sauski@google.com>
Commit-Queue: Olesia Marukhno <olesiamarukhno@google.com>
Cr-Commit-Position: refs/heads/main@{#1003074}