…s switch cp-7.57.0 (#21043)

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## **Description**
This PR fixes following problem:

When a user changes network permissions for a connected dapp (by going
to Permissions tab → "Use your enabled networks" → selecting different
networks → Update), the dapp's provider doesn't get notified of the
network change. Transactions continue to execute on the initial network
instead of the newly permitted network.
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## **Changelog**

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CHANGELOG entry: Fixed a bug preventing network switch when dapp network
permissions changes

## **Related issues**

Fixes: #20722

## **Manual testing steps**

```gherkin
Feature: Dapp network permissions change

  Scenario: user changes network permissions
    Given user connected to the dapp with network A

    When user click on Account Icon on top right corner → goes to Permissions tab → "Use your enabled networks" → selecting different networks → Update
    Then after clicking Connect, network of the dapp should change
```

## **Screenshots/Recordings**

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before and after of your change. -->

https://github.com/user-attachments/assets/b96c2502-777f-43e9-a029-f5d225650bd7
### **Before**

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### **After**

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## **Pre-merge author checklist**

- [x] I’ve followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
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.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Switches the active EVM network for a dapp when network permissions
change and triggers a provider update notification.
> 
> - **MultichainAccountPermissions**
(`MultichainAccountPermissions.tsx`):
> - Implements async `handleNetworksSelected` to switch the dapp's
active EVM network when the current permitted network is removed and
another EVM chain is selected.
> - Uses `isPerDappSelectedNetworkEnabled`, `useNetworkInfo`, and
`selectEvmChainId` to resolve current chain and per-dapp context.
> - Finds target network via `networkConfigurations`, extracts
`networkClientId`, calls
`SelectedNetworkController.setNetworkClientIdForDomain`, and triggers
`SelectedNetworkController.update` to notify the dapp.
> - Adds CAIP helpers (`parseChainId`, `KnownCaipNamespace`,
`hasProperty`) and types (`NetworkConfiguration`).
> - **Tests** (`MultichainAccountPermissions.test.tsx`):
> - Extends Engine and selectors mocks
(Network/SelectedNetworkController, network configurations, per-dapp
flag, network info).
> - Adds test for selecting a new network (e.g., Sepolia) and confirming
update.
>   - Retains and adjusts navigation and selection flow tests.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
ab6d187. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->