Reland "Pass in a SkColorType into SkImage_Gpu ctor."

This reverts commit 42032cb88fb70dcc3cda02451b712e747a9b6171.

Reason for revert: Relanding now that pre CLS that fix initial issue landed

Original change's description:
> Revert "Pass in a SkColorType into SkImage_Gpu ctor."
> 
> This reverts commit 1d17543133c023da03f1ef4ab0a125ca3782957c.
> 
> Reason for revert: android bots
> 
> Original change's description:
> > Pass in a SkColorType into SkImage_Gpu ctor.
> > 
> > This allows us to get rid of using the GrPixelConfig on proxy to create
> > the SkColorType
> > 
> > Bug: skia:6718
> > Change-Id: I1758b79152fa1e8a1796e55d19f5e8ca0b0e8b7b
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/264396
> > Commit-Queue: Greg Daniel <egdaniel@google.com>
> > Reviewed-by: Robert Phillips <robertphillips@google.com>
> 
> TBR=egdaniel@google.com,robertphillips@google.com
> 
> Change-Id: I449e6b0750d611346791beb1dd1346106ad01741
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:6718
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/264469
> Reviewed-by: Mike Klein <mtklein@google.com>
> Commit-Queue: Mike Klein <mtklein@google.com>

TBR=egdaniel@google.com,mtklein@google.com,robertphillips@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: skia:6718
Change-Id: I8088b4e96d1f2c73be03d150fb8f8280a21db5de
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/265496
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
10 files changed