fix: SelectedNetworkController permission state change handler (#4368)

## Explanation

Fixes a bug with `SelectedNetworkController` where it incorrectly sets
the networkClientId for a newly permitted domain when the
useRequestQueue flag is set to false.

## References

See: MetaMask/metamask-extension#25046

## Changelog

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### `@metamask/selected-network-controller`

- **FIXED**: No longer sets the networkClientId for a newly permitted
domain unless the `useRequestQueuePreference` flag is true


## Checklist

- [x] I've updated the test suite for new or updated code as appropriate
- [x] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've highlighted breaking changes using the "BREAKING" category
above as appropriate

---------

Co-authored-by: Alex Donesky <[email protected]>

packages/selected-network-controller/src/SelectedNetworkController.ts

@@ -172,7 +172,11 @@ export class SelectedNetworkController extends BaseController<
             path[0] === 'subjects' && path[1] !== undefined;
           if (isChangingSubject && typeof path[1] === 'string') {
             const domain = path[1];
-            if (op === 'add' && this.state.domains[domain] === undefined) {
+            if (
+              op === 'add' &&
+              this.state.domains[domain] === undefined &&
+              this.#useRequestQueuePreference
+            ) {
               this.setNetworkClientIdForDomain(
                 domain,
                 this.messagingSystem.call('NetworkController:getState')

packages/selected-network-controller/tests/SelectedNetworkController.test.ts

@@ -617,8 +617,10 @@ describe('SelectedNetworkController', () => {
   });
 
   describe('When a permission is added or removed', () => {
-    it('should add new domain to domains list on permission add', async () => {
-      const { controller, messenger } = setup();
+    it('should add new domain to domains list on permission add if #useRequestQueuePreference is true', async () => {
+      const { controller, messenger } = setup({
+        useRequestQueuePreference: true,
+      });
       const mockPermission = {
         parentCapability: 'eth_accounts',
         id: 'example.com',
@@ -638,6 +640,29 @@ describe('SelectedNetworkController', () => {
       expect(domains['example.com']).toBeDefined();
     });
 
+    it('should not add new domain to domains list on permission add if #useRequestQueuePreference is false', async () => {
+      const { controller, messenger } = setup({
+        useRequestQueuePreference: false,
+      });
+      const mockPermission = {
+        parentCapability: 'eth_accounts',
+        id: 'example.com',
+        date: Date.now(),
+        caveats: [{ type: 'restrictToAccounts', value: ['0x...'] }],
+      };
+
+      messenger.publish('PermissionController:stateChange', { subjects: {} }, [
+        {
+          op: 'add',
+          path: ['subjects', 'example.com', 'permissions'],
+          value: mockPermission,
+        },
+      ]);
+
+      const { domains } = controller.state;
+      expect(domains['example.com']).toBeUndefined();
+    });
+
     describe('on permission removal', () => {
       it('should remove domain from domains list', async () => {
         const { controller, messenger } = setup({