Display wallet icon when viewing brave, add button in wallet to open a tab to brave://wallet/swap

[vadimstruts]

• Implemented the possibility to open android wallet confirmation window automatically if swap operation initiated.
• Added wallet icon to the URL bar, when visiting brave://wallet/swap
• The android wallet's swap button will open the new tab with brave://wallet/swap URL, instead of native android swap activity

Resolves brave/brave-browser#29221
Resolves brave/brave-browser#29222
Resolves brave/brave-browser#29223

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a tickets 29221, 29222, 29223 for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• 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 wiki
  • npm run lint, npm run presubmit wiki, 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:

[SergeyZhukovsky]

++

[srirambv]

Verification passed on Oppo Reno 5 with Android 13 running 1.52.40 x64 Nightly build

• Verified able to visit brave://wallet/swap and is immediately connected to the wallet network
• Verified wallet icon is always shown on visiting brave://wallet/swap
• Verified selecting Swap from token details page or from action button loads a new tab and loads brave://wallet/swap
• Verified if there is already an opened swap page, focus is set to it rather than opening a new tab
• Encountered #29680, #29681 & #29682

17947.mp4