validate paint setters in readbuffer

Bug: skia:7425
Change-Id: I55213bc206cf5cfb8cbf4fbe8a682efd6eae59fa
Reviewed-on: https://skia-review.googlesource.com/96860
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Herb Derby <herb@google.com>
7 files changed