Blacklist timing out test.

bug: 73275005
Change-Id: I533426460efbc9d10a97f7f9c7c052f7550d8559
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 2aeccbe..8b5c634 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -661,5 +661,11 @@
         "tests": "674-HelloWorld-Dm",
         "variant": "target",
         "description": ["Requires zip, which isn't available on device"]
+    },
+    {
+        "tests": "712-varhandle-invocations",
+        "variant": "speed-profile & debug & gcstress & target",
+        "bug": "b/73275005",
+        "description": ["Time out"]
     }
 ]