Add zero-copy camera pipeline sample using NDK Camera2 and OpenGL ES

[MohammadNouri5700]

Hi NDK Team,

I would like to propose adding a new sample demonstrating a high-performance, zero-copy camera rendering pipeline using the NDK camera2 APIs, AImageReader, and OpenGL ES.

Motivation
While the existing camera sample effectively demonstrates basic Native Camera2 usage, developers frequently face bottlenecks when attempting low-latency preview rendering, zero-copy frame processing, and synchronization between camera capture streams and the rendering thread.

What the Sample Demonstrates

• Zero-Copy Architecture: Leveraging native buffers (AHardwareBuffer / AImageReader) with OpenGL ES external textures (GL_OES_EGL_image_external) to avoid CPU-memory copy overhead.
• Low-Latency Rendering: Clean separation of camera capture threads and rendering loops using standard Android NDK synchronization primitives.
• Modern Best Practices: Minimal overhead, leak-free buffer recycling, and lifecycle-aware lifecycle management purely in C++ and NDK.

I have already implemented a working prototype in a standalone repository:

https://github.com/MohammadNouri5700/zerostallcam

Question
Would the maintainers be open to accepting this as a new standalone sample in android/ndk-samples?

If so, I am ready to refactor the project to strictly align with this repository's structure, Gradle/CMake conventions, documentation style, and Google CLA requirements before submitting a Pull Request.

Thank you for your time and feedback!