Temporarily make TransferPixelsFromTest read BGRA as RGBA on ES.

Remove disable of transfer support on Tegra.

Longer term we want GrGLGpu to handle the swizzle to BGRA after reading
RGBA. However, deferring that work to be part of color-type/format
refactoring.

Bug: skia:8962
Change-Id: Ib1d75fe0330aaaa02330724e58a1374129274a8f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206699
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
2 files changed