fix: Update network switch from select RPC Modal

[NidhiKJha]

This Pr is to ensure that if the user try to switch a network from the select rpc modal, it's updated

Related issues

Fixes:

Manual testing steps

1. Connect MM to a Dapp
2. Switch to a connected network
3. Try switching from the select rpc modal, it should work

Screenshots/Recordings

Before

Screen.Recording.2025-01-08.at.10.45.46.AM.mov

After

Screen.Recording.2025-01-08.at.6.23.16.PM.mov

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension 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]

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[adonesky1]

why wouldn't we check if the chainId is already permitted before calling to grant it? I mean I'm sure its idempotent but seems like we should check first.