Make shadow in drawShadow test much more prominent

Change-Id: Iea50f4fb6cdd611ceeb77e5ab1dfe6e703ca201d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293681
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Nathaniel Nifong <nifong@google.com>
1 file changed