Add SkSpan support to the Skia LLDB visualizer.
Add SkSpan support to the Skia LLDB visualizer.

Change-Id: Ib974e7c1003ca674cbcd67e62b6c2c328c1c2266
Bug: skia:11103
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/346639
Commit-Queue: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Commit-Queue: Adlai Holler <74c8d5b16bacf4a5997d6535bb4043bbdfe052ea@google.com>
Auto-Submit: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Reviewed-by: Adlai Holler <74c8d5b16bacf4a5997d6535bb4043bbdfe052ea@google.com>

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