Reland "Wayland screencast: refactor EGL DMA-BUF handling for multi-GPU support"

This is a reland of commit dd679612f7bd5a78859f36b160c3a558d9c095ca

Original change's description:
> Wayland screencast: refactor EGL DMA-BUF handling for multi-GPU support
>
> Refactor EGL DMA-BUF implementation to support multi-GPU systems.
>
> Key changes:
> - Split into EglDrmDevice (per-device state) and EglDmaBuf (device
>   manager)
> - Enumerate all EGL devices using eglQueryDevicesEXT
> - Use lazy initialization to avoid waking GPUs in low-power states
> - Prefer Wayland platform device, fall back to first enumerated device
>
> Bug: webrtc:461543454
> Change-Id: Ief0ebabd6067df4f1e18d11eed01c61644e0231a
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/427363
> Reviewed-by: Alexander Cooper <alcooper@chromium.org>
> Commit-Queue: Jan Grulich <grulja@gmail.com>
> Cr-Commit-Position: refs/heads/main@{#46556}

Bug: webrtc:461543454
Change-Id: Ie4c39e7a134beb2ca24bfc542d794a0cdfd22d19
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/440640
Commit-Queue: Jan Grulich <grulja@gmail.com>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Cr-Commit-Position: refs/heads/main@{#46588}