media/gpu/H264Decoder: Utilize IDR frame guarantee with recovery frame

IDR frame guarantees that the frames after IDR frame in decode order
are correct. H264Decoder though skips such frames that are before
recovery frame in output order even though they are after IDR frame
in decoder order. This CL allows outputting such frames.

Bug: b:426554905
Test: vda_tests
Change-Id: I56ea56c39306875fb369c1f5dd5336cc4e966e85
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6658286
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1478721}