Flush color writing in GrGLGpu::flushBlendAndColorWrite for advanced blend modes
Flush color writing in GrGLGpu::flushBlendAndColorWrite for advanced blend modes

I will land the unit test separately

Bug: skia:13612
Change-Id: I21fcfb3799163c9f8a45b8f3c7cecece058a5ca7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/571277
Reviewed-by: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>
Commit-Queue: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia