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This PR improves websocket server teardown to prevent port collision and
skips failing tests.
Context:
https://consensys.slack.com/archives/C02U025CVU4/p1778589879443169

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CHANGELOG entry:

Fixes:

```gherkin
Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]
```

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- [ ] 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).
- [ ] 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](https://jsdoc.app/) format
if applicable
- [ ] 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.

- [ ] I've tested on Android
  - Ideally on a mid-range device; emulator is acceptable
- [ ] I've tested with a power user scenario
- Use these [power-user
SRPs](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/edit-v2/401401446401?draftShareId=9d77e1e1-4bdc-4be1-9ebb-ccd916988d93)
to import wallets with many accounts and tokens
- [ ] I've instrumented key operations with Sentry traces for production
performance metrics
- See [`trace()`](/app/util/trace.ts) for usage and
[`addToken`](/app/components/Views/AddAsset/components/AddCustomToken/AddCustomToken.tsx#L274)
for an example

For performance guidelines and tooling, see the [Performance
Guide](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/400085549067/Performance+Guide+for+Engineers).

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- [ ] 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]
> **Low Risk**
> Low risk: changes are limited to the E2E test harness and smoke specs,
mainly improving WebSocket teardown/port release to avoid CI port
collisions. Main downside is reduced coverage due to multiple smoke
suites being temporarily skipped.
>
> **Overview**
> **Improves E2E WebSocket teardown to avoid port collisions.**
`LocalWebSocketServer` now optionally tracks a `ResourceType` and always
releases its `PortManager` allocation when stopping (including when the
server was never started, and via a `finally` to guarantee cleanup on
errors). `withFixtures` now constructs the account-activity WebSocket
server with `ResourceType.ACCOUNT_ACTIVITY_WS` so this release happens.
>
> **Unblocks CI by skipping failing smoke tests.** Several smoke specs
(native send, EIP-7702 gas fee token flows, perps liquidation, and snap
tests) are switched to `describe.skip` with comments pointing to the
tracking thread.
>
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
54caed9. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->