Fix includes of SkColorSpace

Required to land https://skia-review.googlesource.com/c/skia/+/526416

Change-Id: I7959b36c533f99334096a2bc467853a5aad92978
Bug: skia:13052
diff --git a/libs/hwui/renderthread/VulkanManager.h b/libs/hwui/renderthread/VulkanManager.h
index b816649..cba210d 100644
--- a/libs/hwui/renderthread/VulkanManager.h
+++ b/libs/hwui/renderthread/VulkanManager.h
@@ -51,6 +51,9 @@
 #include "VulkanSurface.h"
 #include "private/hwui/DrawVkInfo.h"
 
+#include <SkColorSpace.h>
+#include <SkRefCnt.h>
+
 class GrVkExtensions;
 
 namespace android {