[modular] Add fuchsia.vulkan.loader.Loader service to test harness

This is a system service that clients may need to use to access a Vulkan
ICD.

Change-Id: I8ecdcb014449ca1a017011de0da1ac5634154cfd
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/513200
Fuchsia-Auto-Submit: John Bauman <jbauman@google.com>
Reviewed-by: Gabe Schine <thatguy@google.com>
Reviewed-by: Tom Robinson <robinsontom@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
diff --git a/src/modular/bin/modular_test_harness/meta/modular_test_harness.cmx b/src/modular/bin/modular_test_harness/meta/modular_test_harness.cmx
index ba22d8a..063e88f 100644
--- a/src/modular/bin/modular_test_harness/meta/modular_test_harness.cmx
+++ b/src/modular/bin/modular_test_harness/meta/modular_test_harness.cmx
@@ -21,7 +21,8 @@
             "fuchsia.sys.Environment",
             "fuchsia.sys.Loader",
             "fuchsia.sysinfo.SysInfo",
-            "fuchsia.ui.activity.Provider"
+            "fuchsia.ui.activity.Provider",
+            "fuchsia.vulkan.loader.Loader"
         ]
     }
 }
\ No newline at end of file