Multiplanar: Implement passthrough decoder CopySharedImageToTexture

This change implements CopySharedImageToTexture for the passthrough
command decoder. Here the texture has already been created and we
create a GrBackendTexture from the texture id. This GrBackendTexture
is then used to create a SkSurface from which we get a canvas and
draw the source shared image into. It follows implementation similar
to that of CopySharedImage where both source and destination are
shared images. This method will be used by PaintCanvasVideoRenderer
for upload video to gl texture and preparig video for WebGL
use cases.

Bug: 1366486
Change-Id: I076a57cc3d1eaf4d6e58f69c429a8d60a3af0540
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4348321
Reviewed-by: Kyle Charbonneau <kylechar@chromium.org>
Commit-Queue: Saifuddin Hitawala <hitawala@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1121742}