rcaps: Remove util.cc's profile country access

Instead of using SearchEngineChoiceService to obtain the profile
country, util.cc now delegates to
TemplateURLPrepopulateData::Resolver the determination of whether the
database needs to merge in the latest data.

The Resolver API deliberately is not a trivial getter, one of the
objectives of this change is to get rid of direct access to the profile
country.

Bug: 328040066
Change-Id: Ib0e281ed808813140bbca0d6a6fbccfbf1b97260
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6268644
Commit-Queue: Tomasz Wiszkowski <ender@google.com>
Auto-Submit: Nicolas Dossou-Gbété <dgn@chromium.org>
Reviewed-by: Tomasz Wiszkowski <ender@google.com>
Cr-Commit-Position: refs/heads/main@{#1429238}