Guard runtime shader/colorfilter against SkSL that doesn't compile

Bug: oss-fuzz:20555
Bug: chromium:1051911
Change-Id: If40137e6cf3c0d398a86023c2399ddb7df10e209
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/270442
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
2 files changed