Bail if context creation fails in FuzzDDLThreadingGL
Bail if context creation fails in FuzzDDLThreadingGL

Bug: oss-fuzz:31634
Change-Id: I9717d04d391c584f28d415fa728c7296edb91723
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/379038
Auto-Submit: Adlai Holler <74c8d5b16bacf4a5997d6535bb4043bbdfe052ea@google.com>
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Reviewed-by: Robert Phillips <95e8ac5504948c7bf91b22c16a8dbb7ae7c66bfd@google.com>
Commit-Queue: Adlai Holler <74c8d5b16bacf4a5997d6535bb4043bbdfe052ea@google.com>

google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia