fix: replicate network change actions in rpc modal

[bergarces]

Description

The issue occurred because switching networks from the RPC selector, which is only available when there's a network with at least 2 RPCs, was not performing the same actions as switching networks from clicking the network list item directly.

I have created a handler for the actions that need to be performed and passed it down to both the network list item and the rpc selector modal, that way it ensures that the same actions occur.

A test has been added to the rpc modal to validate the new handler is being called. Tests already exist in the network list to validate that those actions are taking place, and they are still passing.

Related issues

Fixes: #29260

Manual testing steps

1. Ensure at least one of your networks has more than one RPC, so that the RPC selector appears.
2. Set any network and, in the Tokens tab, select "Current network" as the option.
3. Open the network selector and select another network by clicking in the rpc url, which will open an rpc selector modal.
4. Select any of the RPCs and check that the tokens from the new network appear and that "Current network" is still

Screenshots/Recordings

Before

bug.mp4

After

fixed.mp4

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]

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.

[metamaskbot]

Builds ready [7f66605]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1953 ± 80 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1734	2283	1950	158	76
		domContentLoaded	1675	2272	1916	156	75
		load	1700	2281	1953	166	80
		domInteractive	28	96	47	18	9
		backgroundConnect	14	102	42	26	13
		firstReactRender	18	101	53	28	14
		getState	8	58	20	16	8
		initialActions	0	0	0	0	0
		loadScripts	1247	1715	1416	130	63
		setupStore	9	96	24	24	12
		uiStartup	1990	2897	2299	253	122

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: -2 Bytes (-0.00%)
• common: 0 Bytes (0.00%)

[Prithpal-Sooriya]

LGTM.

[NidhiKJha]

LGTM