fix(flutter): update Android NDK version to 27.0.12077973

[teodorciuraru]

Summary

• Updates Flutter quickstart Android NDK version from flutter.ndkVersion (26.x) to "27.0.12077973"
• Fixes build failure caused by NDK version mismatch with Ditto SDK 4.12.3

Details

The ditto_live Flutter plugin 4.12.3 and its dependencies require Android NDK 27.0.12077973, but the Flutter Gradle plugin provides NDK 26.x by default. This causes build failures with the error:

Your project is configured with **Android NDK 26.3.11579264**, but the following plugin(s) depend on a different Android NDK version:
- ditto_live requires Android NDK 27.0.12077973
- path_provider_android requires Android NDK 27.0.12077973
- permission_handler_android requires Android NDK 27.0.12077973

This PR explicitly sets the NDK version to 27.0.12077973 in the android block of flutter_app/android/app/build.gradle, which is the recommended fix according to the Gradle error message. NDK versions are backward compatible.

Test plan

• Built and ran the Flutter quickstart app on Android emulator successfully
• Verified app launches and loads without NDK-related errors
• Confirmed Ditto SDK 4.12.3 artifacts download correctly

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This PR fixes an Android build failure in the Flutter quickstart by updating the NDK version to match the requirements of the Ditto SDK 4.12.3 and its dependencies.

Key Changes:

• Updates Android NDK version from Flutter's default (26.x) to the explicitly required version 27.0.12077973
• Resolves build failures caused by NDK version mismatch between the Flutter Gradle plugin and Ditto SDK dependencies

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[teodorciuraru]

@phatblat, also reaching out for your review here. Is this PR on point? Do our Android artifacts enforce Android NDK 27 starting 4.12.3?

[pvditto]

Please re-request when ready for review!

[teodorciuraru]

After consulting with @phatblat, it seems like we already want to bump dependencies to NDK 27.0. I couldn't find a better way to make the QS for Flutter build, except for this fix. Marking it Ready for Review.

[Copilot]

Pull Request Overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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[pvditto]

The version was set using a variable to centralize versions used in a single place and have a place to document anything important that maintainers need to know about them. Let's keep with that pattern. If we need two different ndk versions, let's set two different variables and document why they need to diverge. WDYT?