… for UB2 (TRAM-3462) cp-7.74.0 (#29046)

## **Description**

In Unified Buy V2, PayPal is not shown in the Pay With bottom sheet even
when the server would accept it. Two defects stack:

1. `PaymentSelectionModal` and `ProviderSelectionModal` called
`useRampsQuotes` without `redirectUrl`. The quotes API only materializes
a PayPal dummy quote when both `redirectUrl` and `walletAddress` are
provided; otherwise PayPal is only returned under `customActions`.
`BuildQuote` already sends `redirectUrl`, but the selection-stage modals
were inconsistent.
2. `PaymentSelectionModal`'s visibility filter in `renderListContent`
excluded any `success` entry with `quote.isCustomAction: true`, so even
when PayPal surfaced in `success` (e.g. when we do pass `redirectUrl`),
its payment method row was still filtered out and the "No payment
methods are available." banner was shown.

This PR:

- Passes `redirectUrl: getRampCallbackBaseUrl()` from
`PaymentSelectionModal` and `ProviderSelectionModal`, matching
`BuildQuote`'s existing shape so the quotes request is consistent across
selection stages.
- Drops `!isCustomAction(q)` from the `visiblePaymentMethods` filter so
custom-action quotes count as "available" for listing. The per-item
`matchedQuote` find remains strict, so custom-action rows still do not
render a misleading priced preview.

## **Changelog**

CHANGELOG entry: Fixed a bug where PayPal was missing from the Pay With
list in Unified Buy V2 and the selector showed "No payment methods are
available." instead.

## **Related issues**

Fixes:
https://consensyssoftware.atlassian.net/jira/software/c/projects/TRAM/boards/1568?assignee=712020%3Afd12f7ea-d9e1-4a0a-8a26-36804c9e11c9&selectedIssue=TRAM-3462

## **Manual testing steps**

```gherkin
Feature: Pay With selector surfaces PayPal (UB2)

  Scenario: PayPal is available as a payment method
    Given the user is in the Unified Buy V2 flow with PayPal supported in their region
    And the user has selected a crypto asset and amount

    When the user opens the Pay With bottom sheet
    Then the PayPal row appears in the list
    And the "No payment methods are available." banner is not shown

  Scenario: PayPal row does not show a misleading price
    Given PayPal is available in the Pay With list
    When the user views the PayPal row
    Then no crypto amount or fiat amount is rendered for the row
    And the row remains tappable

  Scenario: Selecting PayPal continues into its checkout flow
    Given PayPal is listed in the Pay With sheet
    When the user taps the PayPal row
    Then the sheet closes and the existing custom-action checkout flow runs
```

## **Screenshots/Recordings**

### **Before**

<!-- [screenshots/recordings] -->
https://www.loom.com/share/865aefe1f2024ed28f0564192c01bf0b

### **After**

<!-- [screenshots/recordings] -->
https://www.loom.com/share/556420ed2f3c41028cc9a1fc21b0d847

## **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
- [ ] 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]
> **Low Risk**
> Small UI selection logic change plus added test coverage; risk is
limited to which payment methods are shown and the quote request
parameters sent.
> 
> **Overview**
> Fixes Unified Buy V2 payment/provider selection so quote fetches from
`PaymentSelectionModal` and `ProviderSelectionModal` include
`redirectUrl: getRampCallbackBaseUrl()`, aligning them with the Build
Quote flow and enabling providers that require a redirect URL to surface
correctly.
> 
> Updates the payment-method visibility filter to treat custom-action
quotes as “available” (so their rows remain listed), while keeping
per-row price previews gated by non-custom-action quotes; tests were
updated/added to cover both the new `redirectUrl` param and the
custom-action visibility/no-price behavior.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
8c4209e. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->