Disable srgb on vulkan nexus player

Bug: skia:
Change-Id: I4f7656badf1b2faec6ed02687e8e0ff2b4daf7f4
Reviewed-on: https://skia-review.googlesource.com/17718
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

src/gpu/vk/GrVkCaps.cpp

@@ -117,6 +117,12 @@ void GrVkCaps::init(const GrContextOptions& contextOptions, const GrVkInterface*
     }
 #endif
 
+#if defined(SK_CPU_X86)
+    if (kImagination_VkVendor == properties.vendorID) {
+        fSRGBSupport = false;
+    }
+#endif
+
     this->applyOptionsOverrides(contextOptions);
     fShaderCaps->applyOptionsOverrides(contextOptions);
 }