Updates countries for uphold promotion

[NejcZdovc]

Resolves brave/brave-browser#12372

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Verified that these changes build without errors on
  • Android
  • iOS
  • Linux
  • macOS
  • Windows
• Verified that these changes pass automated tests (unit, browser, security tests) on
  • iOS
  • Linux
  • macOS
  • Windows
• Verified that all lint errors/warnings are resolved (npm run lint, npm run gn_check)
• Ran git rebase master (if needed).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Requested a security/privacy review as needed.
• Added appropriate QA labels (QA/Yes or QA/No) to the associated issue
• Added appropriate release note labels (release-notes/include or release-notes/exclude) to the associated issue
• Public documentation has been updated as necessary. For instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-compatibility-issues-with-tracking-protection
  • https://github.com/brave/brave-browser/wiki/QA-Guide

Test Plan:

• set locale to one of the countries in the list and make sure that you see the promotion
  • list of supported locales: https://github.com/brave/brave-core/pull/6982/files#diff-6b6ed7044cbb83bc4e57c74f9d946505e033ec70915527c7d525351b0a4c8e48

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Request a security/privacy review as needed.
• Adequate test coverage exists to prevent regressions
• Verify test plan is specified in PR before merging to source

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on.
• All relevant documentation has been updated.

[emerick]

LGTM

[kjozwiak]

Verification PASSED on macOS 10.15.7 x64 using the following build:

Brave | 1.18.19 Chromium: 87.0.4280.27 (Official Build) nightly (x86_64)
-- | --
Revision | d8c1fe98de8d9c6bd46ebe8b0cc9d2b6bdccca1e-refs/branch-heads/4280@{#556}
OS | macOS Version 10.15.7 (Build 19H2)

• ensured that the equities uphold card wasn't being displayed when using US, CA&UA`
• ensured that the equities uphold card was being correctly dislayed when using BA, CN, AR & VE
• ensured that the equities uphold card is visible when refreshing/re-opening brave://rewards
• ensured that the equities uphold card is visible after restarting Brave several times
• ensured that clicking on X closes the promo and ensured that it's never visible again (refreshing/re-loading/restarting)
• ensured that clicking on the card opens a new tab and loads the following:
  • https://uphold.com/en/buy-fractional-shares/brave --> https://uphold.com/en/buy-fractional-shares
• Found promo cards under "brave://rewards" are not appearing initially on new profiles (requires refresh) brave-browser#12406 while running through the above cases

Countries without promo	Countries with promo

[kjozwiak]

@NejcZdovc @mandar-brave should https://uphold.com/en/buy-fractional-shares/brave be redirected to https://uphold.com/en/buy-fractional-shares? Right now it basically opens the above link using /brave and than redirects. Expected?

[NejcZdovc]

expected, this is fully controlled by uphold

[kjozwiak]

@NejcZdovc do we need to remove the U.S part from the card now that US was removed from the list of supported regions?

CCing @LaurenWags

[NejcZdovc]

@kjozwiak nope all good, this is more meant as that you can trade with US companies