Revert "GrClips provided as pointers to GrRTC"

This reverts commit 226b689471a0fbb7400bc166032458278957541b.

Reason for revert: Breaks Android roller

Original change's description:
> GrClips provided as pointers to GrRTC
> 
> A null clip represents no high-level clipping is necessary (the implicit
> clip to the render target's logical dimensions is fine).
> 
> This also removes GrNoClip and GrFixedClip::Disabled() since they are
> replaced with just nullptr.
> 
> By allowing nullptr to represent no intended clipping, it makes it easier
> to require GrClip and GrAppliedClip objects to know about the dimensions
> of the device. If we required a non-null clip object to represent no
> clipping, we'd have to have an instance for each device based on its
> size and that just became cumbersome.
> 
> Bug: skia:10205
> Change-Id: Ie30cc71820b92d99356d393a4c98c8677082e761
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290539
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,csmartdalton@google.com,michaelludwig@google.com

Change-Id: I42c4828bcf016ee3d30d5c20b771be96e125817b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:10205
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292856
Reviewed-by: Weston Tracey <westont@google.com>
Commit-Queue: Weston Tracey <westont@google.com>
79 files changed