Add Ecosia as an alternative search in several regions

[bsclifton]

Fixes brave/brave-browser#13511

Submitter Checklist:

• There is a ticket for my issue.
• Used Github auto-closing keywords in the commit message.
• Wrote a good PR/commit description
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed).
• Requested a security/privacy review as needed.

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

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, 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-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

See brave/brave-browser#13511

[mkarolin]

++

[bsclifton]

CI looked good; there was just a lint fix... I pushed this fix and will merge (so CI doesn't run again)

[kjozwiak]

Verification PASSED on Win 10 x64 using the following build:

Brave | 1.21.21 Chromium: 88.0.4324.96 (Official Build) nightly (64-bit)
-- | --
Revision | 68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
OS | Windows 10 OS Version 2009 (Build 19042.746)

Went through the following with the new regions motioned via brave/brave-browser#13511 (comment):

• ensured that Yahoo was removed and Ecosia was being added via the following area's:
  • brave://welcome, brave://settings/search & brave://settings/searchEngines
• ensured Ecosia uses the following formatting via brave://settings/searchEngines
  • https://www.ecosia.org/search?tt=e8eb07a6&q=%s
• ensured that tt=e8eb07a6 is being appended to search queries from the omnibox/URL bar
• ensured tt=e8eb07a6 isn't being appended if you're doing a search via https://www.ecosia.org
• ensured that you can set Ecosia as the default via the following:
  • brave://welcome, brave://settings/search & brave://settings/searchEngines

Clean Install

Austria

Region	Onboarding	Search Settings	Search Settings	Search

Ireland

Ensured that DDG was the default search engine as per the following:

Region	Onboarding	Search Settings	Search Settings	Search

Denmark

Region	Onboarding	Search Settings	Search Settings	Search

Luxembourg

Region	Onboarding	Search Settings	Search Settings	Search

Norway

Region	Onboarding	Search Settings	Search Settings	Search

Australia

Region	Onboarding	Search Settings	Search Settings	Search

Spain

Region	Onboarding	Search Settings	Search Settings	Search

Greece

Region	Onboarding	Search Settings	Search Settings	Search

Italy

Region	Onboarding	Search Settings	Search Settings	Search

Hungary

Region	Onboarding	Search Settings	Search Settings	Search

Portugal

Region	Onboarding	Search Settings	Search Settings	Search

Canada

Region	Onboarding	Search Settings	Search Settings	Search

Finland

Region	Onboarding	Search Settings	Search Settings	Search

Updates

Ireland - DDG Default

• downloaded 1.21.12 CR: 88.0.4324.96 and ensured Ecosia wasn't being listed and DDG was the default SE
• upgraded to 1.21.21 Chromium: 88.0.4324.96
• ensured that DDG is still the default SE
• ensured that Ecosia is being displayed in the following area's
  • brave://welcome, brave://settings/search & brave://settings/searchEngines
• ensured Ecosia uses the following formatting via brave://settings/searchEngines
  • https://www.ecosia.org/search?tt=e8eb07a6&q=%s

Default (1.21.12)	Search Settings	Search Settings

Canada - Google Default

• downloaded 1.21.12 CR: 88.0.4324.96 and ensured Ecosia wasn't being listed and Google was the default SE
• upgraded to 1.21.21 Chromium: 88.0.4324.96
• ensured that Google is still the default SE
• ensured that Ecosia is being displayed in the following area's
  • brave://welcome, brave://settings/search & brave://settings/searchEngines
• ensured Ecosia uses the following formatting via brave://settings/searchEngines
  • https://www.ecosia.org/search?tt=e8eb07a6&q=%s

Default (1.21.12)	Search Settings	Search Settings

Austria - Changing Default

• downloaded 1.21.12 CR: 88.0.4324.96 and ensured Ecosia wasn't being listed and Google was the default SE
• changed the default SE to Bing using brave://settings/searchEngines
• upgraded to 1.21.21 Chromium: 88.0.4324.96
• ensured that Bing is still the default SE
• ensured that Ecosia is being displayed in the following area's
  • brave://welcome, brave://settings/search & brave://settings/searchEngines
• ensured Ecosia uses the following formatting via brave://settings/searchEngines
  • https://www.ecosia.org/search?tt=e8eb07a6&q=%s

Changed (1.21.12)	Search Settings	Search Settings