Respect HDR/HDR10 colormodes in HWUI Vulkan backend

Test: SilkFX
Bug: 184283931
Change-Id: I724eb683a03f7ada4561c245aca5fffe7b6a5ac9
diff --git a/libs/hwui/renderthread/VulkanSurface.h b/libs/hwui/renderthread/VulkanSurface.h
index 409921b..7c25545 100644
--- a/libs/hwui/renderthread/VulkanSurface.h
+++ b/libs/hwui/renderthread/VulkanSurface.h
@@ -91,6 +91,7 @@
         SkISize size;
         uint32_t bufferFormat;
         android_dataspace dataspace;
+        sk_sp<SkColorSpace> colorspace;
         int transform;
         size_t bufferCount;
         uint64_t windowUsageFlags;