fix: add CMAKE_VERSION override to build.yml for RN 0.81 compatibility (#29899)

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## **Description**

After the React Native 0.81.5 upgrade, the Android build step in
build.yml fails with error CXX1300 because RN's
ReactAndroid/build.gradle.kts defaults to CMake 3.30.5, which isn't
installed on CI runners (they have 3.22.1). This adds the CMAKE_VERSION:
'3.22.1' env var override

The same fix already appliedin build-android-e2e.yml, so Gradle uses the
available CMake instead of failing.
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## **Changelog**


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CHANGELOG entry: @metamask/mobile - Fixed: Add CMAKE_VERSION override to
build.yml to fix Android CI build after RN 0.81.5 upgrade

## **Related issues**

Fixes:

## **Manual testing steps**

```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]
```

## **Screenshots/Recordings**

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### **Before**

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### **After**

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## **Pre-merge author checklist**

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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).
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- [ ] I've included tests if applicable
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Not required for external contributors.

#### Performance checks (if applicable)

- [ ] 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
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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: this only adjusts CI build environment configuration, but
could affect Android native build tooling if a different CMake version
is actually required on some runners.
> 
> **Overview**
> Ensures CI builds don’t fail after the React Native 0.81 upgrade by
exporting `CMAKE_VERSION=3.22.1` during the main `build.yml` build step,
overriding RN’s default request for CMake 3.30.5 that isn’t available on
the runner.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
85aee8d. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: adnxy

.github/workflows/build.yml

@@ -425,6 +425,12 @@ jobs:
         timeout-minutes: 115
         env:
           GIT_BRANCH: ${{ inputs.source_branch || github.ref_name }}
+          # React Native 0.81's ReactAndroid/build.gradle.kts requests CMake 3.30.5
+          # via `System.getenv("CMAKE_VERSION") ?: "3.30.5"`. The self-hosted runner
+          # only ships CMake 3.22.1 in /opt/android-sdk/cmake/ and AGP cannot auto-
+          # download missing components, causing CXX1300. RN's CMakeLists.txt files
+          # only require >= 3.13, so 3.22.1 is fully sufficient.
+          CMAKE_VERSION: '3.22.1'
         uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 #v3.0.2
         with:
           timeout_minutes: 55