Fuchsia: Blacklist swiftshader on Fuchsia

This doesn't work and is highly misleading as the tests run with the real
GPU.

Bug: angleproject:4353
Change-Id: Id9139436e39d5e8e063bcc679b7c63f589d3b748
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2023912
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/tests/test_utils/angle_test_instantiate.cpp

@@ -373,6 +373,11 @@ bool IsConfigWhitelisted(const SystemInfo &systemInfo, const PlatformParameters
         if (param.majorVersion > 2 && IsARM())
             return false;
 
+        // Loading swiftshader is not brought up on Fuchsia.
+        // TODO(anglebug.com/4353): Support loading swiftshader vulkan ICD.
+        if (param.getDeviceType() == EGL_PLATFORM_ANGLE_DEVICE_TYPE_SWIFTSHADER_ANGLE)
+            return false;
+
         // Currently we only support the Vulkan back-end on Fuchsia.
         return (param.getRenderer() == EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE);
     }