Include hierarchy of direct dependencies

Direct dependency classes may be loaded before secondary dex
installation: so their hierarchy is needed in the main dex or they
will be rejected at load and cause NoClassDefFoundError at first use.

Bug: 72039872
Change-Id: Ida42c70f9c8e1c7e16ad779bce7ea038a8124782
diff --git a/src/test/examples/multidex005/Interface3.java b/src/test/examples/multidex005/Interface3.java
new file mode 100644
index 0000000..ea3fc72
--- /dev/null
+++ b/src/test/examples/multidex005/Interface3.java
@@ -0,0 +1,9 @@
+// Copyright (c) 2018, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package multidex005;
+
+public interface Interface3 {
+
+}