Enable support of Unstoppable Domains and ENS on Android

[yrliou]

Resolves brave/brave-browser#15159
Resolves brave/brave-browser#15373

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• 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)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• 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:

1. Open settings ->Privacy & Security -> Unstoppable Domains, the settings should be Ask.
2. Visit brad.crypto, interstitial page for opting in should be shown, click Disable.
3. Go to settings ->Privacy & Security -> Unstoppable Domains, the settings should be Disabled.
4. Change it back to Ask.
5. Visit brad.crypto again, and click Proceed this time in the interstitial page.
6. Page should be loaded and setting should be changed to DNS over HTTPS.
   Repeat 1-6 but using almonit.eth this time.
7. Go to settings ->Privacy & Security -> Unstoppable Domains, set to Ethereum
8. Visit brave.crypto, the page should be redirected and loaded via IPFS public gateway.

[SergeyZhukovsky]

++

[mkarolin]

chromium_src change ++

[srirambv]

Verification passed on OnePlus 6T with Android 10 running 1.25.35 x64 nightly build

• Verified test plan from PR description
• Verified default setting is set to Ask for UD
• Verified visiting brad.crypto shows interstitial page
• Verified Proceed using Cloudflare loads the page
• Verified setting is set to DoH once the page is loaded
• Verified setting UD to Ethereum and visiting brave.crypto loads the page via public IFPS gateway

Screenshots

Settings

Default (Ask)	Denied	DNS over HTTPS	Etherem

Page Loads

Interstitial page	Page loaded successfully (DoH)	Page load failed (Denied)	Page loaded via IPFS public gateway