feat(wallet): View on Block Explorer Modal

[Douglashdaniel]

Description

• Introduces a View on block explorer button on the Account Details page
• Introduces a View on block explorer modal for EVM and SVM networks, to allow user to select which Block Explorer to view their account on.

Resolves brave/brave-browser#39655

Submitter Checklist:

• I confirm that no security/privacy review is needed and no other type of reviews are needed, or that I have requested them
• There is a ticket 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 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/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 the Wallet and navigate to the Accounts page.
2. Click on an Ethereum account and then click on the View on block explorer button
3. You should see the View on block explorer modal
4. Test clicking on networks to view on it's Block Explorer.
5. Follow these same steps for a Solana account
6. Now test clicking on the View on block explorer button for a Filecion and Filecoin Testnet account
7. It should open directly to the Block Explorer
8. BTC and ZEC accounts are currently not supported for this feature, so there should not be a View on block explorer button.

Screen.Recording.11.mov

[josheleonard]

Approved with comments

[yrliou]

core++

[brave-builds]

A Storybook has been deployed to preview UI for the latest push

[mkarolin]

strings++