Regional ad relevance is not shown in brave://rewards after changing locale

[btlechowski]

Follow up to #21038. The issue is still reproducible.

Steps to Reproduce

1. Set locale to English (United States). On Windows: Set Regional format Windows setting to English (United States)
2. Use US connection (or use charles to override https://geo.ads.brave.com/v1/getstate with {"country":"US","region":"CA"})
3. Run Brave with logging enabled
4. Enable rewards and ads
5. Make sure that response from https://geo.ads.brave.com/v1/getstate has proper country(US) and region
6. Open Brave Private Ads settings in brave://rewards/
7. Check if Regional ad relevance is shown
8. Change Regional ad relevance to Alabama
9. Close Brave
10. Set locale to Poland Polish
11. Run Brave
12. Open Brave Private Ads settings in brave://rewards/
13. Close Brave
14. Set locale to English (United States)
15. Run Brave
16. Open Brave Private Ads settings in brave://rewards/

Actual result:

Regional ad relevance is not shown

Expected result:

Regional ad relevance is shown

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.42.83 Chromium: 104.0.5112.69 (Official Build) (64-bit)
Revision	7ce2902023c722af8564068e6b26e934b83fd774-refs/branch-heads/5112@{#1213}
OS	Ubuntu 18.04 LTS

cc @rebron @tmancey @aseren @brave/qa-team

[tmancey]

@aseren if you could close and add a QA/Yes label and set the milestone when merging #16682 that would be great :-)

[aseren]

The issue was fixed here: #16682

[btlechowski]

Verification passed on

Brave	1.45.75 Chromium: 106.0.5249.65 (Official Build) beta (64-bit)
Revision	3269dc3633cdd2ab94546fdbe54962e45b17a6e0-refs/branch-heads/5249@{#580}
OS	Ubuntu 18.04 LTS

Default: California

Changed to Alabama

After switching from PL to US, Alabama is shown

[GeetaSarvadnya]

Verification PASSED on Samsung galaxy Tab A7 version 12 running Bravemonoarm64.apk_1.45.106

• Confirmed that when country and region is overriden to {"country":"US","region":"CA"}) the Regional ad relevance is shown in the brave://rewards Ads settings section
• Confirmed that when the locale is set to Poland Polish the Regional ad relevance is NOT shown in the brave://rewards Ads settings section (Regional ad relevance is supported for only "US")

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