build: CMake 4.1.2 for the runtime native build

[edusperoni]

Bumps the CMake used to build the runtime's native code from 3.31.6 to 4.1.2, the latest on the stable channel of Google's SDK repository, in both workflows and runtime/build.gradle.

Why it is safe

• The runtime's CMakeLists.txt asks for 3.18.1, above the 3.5 floor CMake 4 still accepts.
• Only the runtime AAR build in this repo uses the version. Nothing shipped to apps invokes CMake: the copied app/build.gradle mentions it only in commented-out code, and apps consume the prebuilt AAR. User projects are unaffected.

Verified locally with cmake;4.1.2 from the SDK manager: :runtime:assembleDebug -Pabis=arm64-v8a --warning-mode all builds the AAR, CMakeCache.txt shows sdk/cmake/4.1.2/bin/cmake, and there are no CMake deprecation or policy warnings in the output.

Summary by CodeRabbit

• Chores
  • Updated the CMake version used for app builds, tests, and pull request checks to 4.1.2.

[coderabbitai]

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Advanced

Run ID: 9df9e50e-6910-4b49-af02-a37836c2b03e

📥 Commits

Reviewing files that changed from the base of the PR and between b6f5f7c and 8c83e9f.

📒 Files selected for processing (3)

• .github/workflows/npm_release.yml
• .github/workflows/pull_request.yml
• test-app/runtime/build.gradle

Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review.

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📝 Walkthrough

Walkthrough

The NPM release workflow, pull request workflow, and test app build configuration now specify CMake 4.1.2 instead of 3.31.6.

Changes

CMake version update

Layer / File(s)	Summary
CMake version settings .github/workflows/npm_release.yml, .github/workflows/pull_request.yml, test-app/runtime/build.gradle	All three configuration locations change the CMake version from 3.31.6 to 4.1.2.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Suggested reviewers: nathanwalker

Merge Risk: ⚪ Minimal · up to 8c83e

The CMake update is consistent across the runtime configuration and release setup. No actionable merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the CMake version update for the runtime native build, which is the main change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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_{A rabbit checks the build once more
CMake’s version changed at the door
Release and pull request align
The test app follows the line
Ears perk up; the settings agree
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