Add com.android.dex.* to the debugger tests ANDROID_FILTER.

At least ART 6.0.1 and 7.0.0 use classes in this package as part of the
reflection library.

Change-Id: I3eb0fe73936732429eccb19b7f85a5188ce0e5b2
diff --git a/src/test/java/com/android/tools/r8/debug/DebugTestBase.java b/src/test/java/com/android/tools/r8/debug/DebugTestBase.java
index d41ee84..5707812 100644
--- a/src/test/java/com/android/tools/r8/debug/DebugTestBase.java
+++ b/src/test/java/com/android/tools/r8/debug/DebugTestBase.java
@@ -1943,6 +1943,7 @@
             .addAll(super.getExcludedClasses())
             .add("libcore.*")
             .add("dalvik.*")
+            .add("com.android.dex.*") // Android 6.0.1 - 7.0.0 use this for reflection.
             .build();
       }
     }