Fix issue where per dapp selected network state is enabled without the request queue experimental toggle enabled

[adonesky1]

In #21522, the perDomainNetwork state was left as always enabled. This state should be toggled on and off with the Select networks for each site experimental setting.

Fixes: #21876

Manual testing steps

Pertaining to the fix for #21876

1. Load MetaMask and the test dapp: https://metamask.github.io/test-dapp/
2. Switch to Sepolia and connect MetaMask to the test dapp
3. Switch to Goerli --> Notice that no TST tokens are displayed
4. Switch to Sepolia again
5. In the test dapp, deploy erc-20 contract
6. Confirm the request
7. Proceed to add token/watch asset
8. Confirm the request
9. In the tokens list, see that the TST token is present on Sepolia

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained what problem this PR is solving and how it is solved.
• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• 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.
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

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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[metamaskbot]

Builds ready [e223b71]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4
  • common: 0, 1, 2, 3, 4, 5, 6
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (658 ± 297 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	91	154	111	17	8
		domContentLoaded	70	131	98	17	8
		load	83	1502	658	618	297
		domInteractive	70	131	98	17	8

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 76 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)