Revert of Allow stencils to be attached to render targets created via SkSurface:...

Revert of Allow stencils to be attached to render targets created via SkSurface::MakeFromBackendTextureAsRend… (patchset #1 id:60001 of https://codereview.chromium.org/1941353003/ )

Reason for revert:
Breaking the ANGLE bots. Message is:

Caught exception 3221225477 EXCEPTION_ACCESS_VIOLATION

8.59m elapsed, 1 active, 82 queued, 315MB RAM, 1442MB peak
	unit test  SurfaceAttachStencil_Gpu
step returned non-zero exit code: -1073741819

Original issue's description:
> Allow stencils to be attached to render targets created via SkSurface::MakeFromBackendTextureAsRenderTarget
>
> This is a regression from "Refactor to separate backend object lifecycle
> and GpuResource budget decision".
>
> GrGLRenderer::canAttemptStencilAttachment was incorrectly returning false
> for all wrapped render targets. This function should return false only if
> the FBO is wrapped (unowned). If the FBO is owned by Skia, we can attach
> stencils.
>
> BUG=608238
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1924183003
>
> Committed: https://skia.googlesource.com/skia/+/0736f3386820f19c0fe90b5dda2094e253780071

TBR=bsalomon@google.com,kkinnunen@nvidia.com,ericrk@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=608238

Review-Url: https://codereview.chromium.org/1947143002