Blacklist lbjdwp flaky test.

bug: 69121056
Change-Id: I3239964425c1ca274e33518fe91f5ef11be1d018
diff --git a/tools/libjdwp_art_failures.txt b/tools/libjdwp_art_failures.txt
index 646a96a..354bee8 100644
--- a/tools/libjdwp_art_failures.txt
+++ b/tools/libjdwp_art_failures.txt
@@ -91,5 +91,11 @@
            "org.apache.harmony.jpda.tests.jdwp.ThreadGroupReference.NameTest#testName001_NullObject",
            "org.apache.harmony.jpda.tests.jdwp.ThreadGroupReference.ParentTest#testParent_NullObject",
            "org.apache.harmony.jpda.tests.jdwp.VirtualMachine.CapabilitiesNewTest#testCapabilitiesNew001" ]
+},
+{
+  description: "Test is flaky",
+  result: EXEC_FAILED,
+  bug: 69121056,
+  name: "org.apache.harmony.jpda.tests.jdwp.ObjectReference.IsCollectedTest#testIsCollected001"
 }
 ]