Revert^2 "Remove finalizable restriction on structural redefinition"

This reverts commit 0b1afb7c63d99c88f90f17770ad94ccb0b0c57d3.

Daemon shutdown is known to be somewhat flaky. That seems to be the
cause of this failure.

Reason for revert: Removed Daemon threads from tests 2006 & 2007.
Bug: 134162467
Test: % ./art/test/run-test --create-runner --host --prebuild --compact-dex-level fast --jit --no-relocate --runtime-option -Xcheck:jni --debuggable --runtime-option -Xopaque-jni-ids:true --64 2007
      ...
      Runnable test script written to /tmp/allight/test-230585/runit.sh
      ...
      % ./art/tools/parallel_run.py -j80 /tmp/allight/test-230585/runit.sh --out failure.txt
Test: ./art/test/run-test --create-runner --host --prebuild --compact-dex-level fast --jit --no-relocate --runtime-option -Xcheck:jni --debuggable --runtime-option -Xopaque-jni-ids:true --64 2006

Change-Id: I392a2936995dd05b08feea36f11b616c1548ae46
diff --git a/test/2006-virtual-structural-finalizing/src/Main.java b/test/2006-virtual-structural-finalizing/src/Main.java
new file mode 100644
index 0000000..89b8557
--- /dev/null
+++ b/test/2006-virtual-structural-finalizing/src/Main.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class Main {
+  public static void main(String[] args) throws Exception {
+    System.out.println("FAIL: Test is only for art!");
+  }
+}