Check IsGpuCompositingEnabled() for CreateSharedBitmapProvider()

In CanvasRenderingContextHost, instead of checking resource
dispatcher, we check IsGpuCompositingEnabled() for
CreateSharedBitmapProvider(). Software canvas provider does not rely
on resource dispatcher.


This change is put behind a feature flag
UseSharedBitmapProviderForSoftwareCompositing because we start using
TextureLayer instead of compositing into tile.

Bug: 40064122
Change-Id: Id70ee6176cadea3a1e7f380781a1ddb4084a730c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6051108
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Commit-Queue: Maggie Chen <magchen@chromium.org>
Reviewed-by: Aaron Krajeski <aaronhk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1395548}