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This is a reland of 0c9696bf

Original change's description:
> ExternalVkImageBacking: fix concurrent read problem
> 
> Concurrent read access from both GL and Vulkan is not allowed.
> Get rid of the concurrent read problem by releasing the texture
> from GL temporarily, when a Vulkan read is requested. And resume
> GL read access, when the Vulkan read access is over.
> Current chrome GL and Vulkan concurrent read pattern is - Blink holds
> and caches read access for a backing shared image for a WebGL or
> 2D canvas. SkiaOutputSurfaceImplOnGpu only requests read access just
> before playing back DDL and releases the read access after playing back
> DDL and before SwapBuffers. The GPU will not schedule other tasks
> between playing back DDL and SwapBuffers. So it should be safe to
> temporarily pause GL read access.
> 
> Bug: 1104231
> Change-Id: I729eeebd5196bc5387ac148133b5926358bb4b53
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2311330
> Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
> Commit-Queue: Peng Huang <penghuang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#791022}

Bug: 1104231
Change-Id: Ia916f250ca30b3c2b8a07016d2530fad79385aa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2316399Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791520}