feat: Solana dapp connectivity announcement toast (cherry pick from #15224)

[owencraston]

Description

Render a toast indicating that solana dapp connectivity is coming soon when a user opens the in app browser and their current account is a Solana account.

Design is here:
https://www.figma.com/design/VqbOpEAsKGogdhZ5IsL4Pu/Solana?m=auto&node-id=2771-7777&t=IUlpwfo4owE10Ybw-1

Related issues

Fixes: #14563

Manual testing steps

1. ensure that you are building beta by editing your METAMASK_BUILD_TYPE to beta in the .js.env file
2. import or create a wallet
3. create a solona account
4. ensure that the solana account is selected
5. navigate to the browser
6. you should see the Toast that matches the designs pop up
7. now navigate back to the wallet view and select an ethereum account
8. navigate back to the browser
9. notice that the toast does not pop up

Screenshots/Recordings

Before

After

screen-20250508-212013.mp4

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding
  Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[github-actions]

Bitrise

❌❌❌ pr_smoke_e2e_pipeline failed on Bitrise! ❌❌❌

Commit hash: 100aa71
Build link: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/a715afea-2fae-4e6f-9ed1-a03c5457d077

Note

• You can kick off another pr_smoke_e2e_pipeline on Bitrise by removing and re-applying the Run Smoke E2E label on the pull request

Tip

• Check the documentation if you have any doubts on how to understand the failure on bitrise

dismissing review because of failed CI

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
88.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 70.83333% with 7 lines in your changes missing coverage. Please review.

Please upload report for BASE (release/7.47.0@795328f). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
app/components/Views/Browser/index.js	70.83%	7 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##             release/7.47.0   #15339   +/-   ##
=================================================
  Coverage                  ?   68.65%           
=================================================
  Files                     ?     2377           
  Lines                     ?    51331           
  Branches                  ?     7640           
=================================================
  Hits                      ?    35240           
  Misses                    ?    13850           
  Partials                  ?     2241           

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