Reland "Implement constructor in RTCEncodedVideoFrame"

This is a reland of commit edd81f4f02dd5ebb365f0e7eceb42780a881920f

Reason for reland: The CL was reverted because of https://issues.chromium.org/issues/328306658, which now has been fixed.

Original change's description:
> Implement constructor in RTCEncodedVideoFrame
>
> This is inline with the algorithm described in https://github.com/w3c/webrtc-encoded-transform/compare/main...palak8669:webrtc-encoded-transform:constructor_frame
>
> This is a reland of https://chromium-review.googlesource.com/c/chromium/src/+/5295578 which got reverted due
> to wrong include rules.
>
> Bug: 14709
> Change-Id: I5da20d10295908b2592c3c7202aa56fd206bf908
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5307134
> Reviewed-by: Guido Urdaneta <guidou@chromium.org>
> Commit-Queue: Palak Agarwal <agpalak@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1268408}

Bug: 14709
Change-Id: I8e827e7df8fee676e85580b5f6e1044fa06ea6a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5366041
Commit-Queue: Palak Agarwal <agpalak@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1271544}