Remove uses of GrPixelConfig version of GrBytesPerPixel.

Bug: skia:6718
Change-Id: I8421f38644567973f0b8de29b745ca9a471583bf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/247598
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
34 files changed