[merchant trust] Fetch data from service for the chip

Fetch the data from the service and show the merchant trust chip if the
data is available for the URL. Permission chips, keyword mode, editing
mode takes precedence over the merchant trust chip. After a higher
priority view is hidden, the chip is shown again.

Bug: 378854462
Change-Id: Icd80aaa3eb623ead11675a152fbeae6514360c30
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6072175
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Commit-Queue: Olesia Marukhno <olesiamarukhno@google.com>
Reviewed-by: Nicola Tommasi <tommasin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1393630}