public_includes -= include/third_party/vulkan
public_includes -= include/third_party/vulkan

Got a little overzealous cleaning up public_include_dirs
in https://skia-review.googlesource.com/c/skia/+/209706.
This puts everything back how it used to be, with Skia
always using them internally, and only test code using
them externally.

Change-Id: I7f17afbaf20469e78f0f633254f17123e97233fc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211083
Reviewed-by: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>
Commit-Queue: Mike Klein <14574f09dfa9b4e14759b88c3426a495a0e627b0@google.com>

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