Track gl format bytes per pixel on format table.

Bug: skia:6718
Change-Id: Id611e0f5c317908cb63f1afdafff28ebf6cf8158
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/247049
Commit-Queue: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
4 files changed