ART: Fix type parameter in tests

Move Class to Class<?>, Constructor to Constructor<?>, and in
general clean up reflection.

Test: m test-art-host-run-test
Change-Id: I3a4223ee8d14d032015edf34bf27135757f7138c
diff --git a/test/004-UnsafeTest/src/Main.java b/test/004-UnsafeTest/src/Main.java
index 9d4618a..d43d374 100644
--- a/test/004-UnsafeTest/src/Main.java
+++ b/test/004-UnsafeTest/src/Main.java
@@ -249,6 +249,6 @@
     public volatile Object volatileObjectVar = null;
   }
 
-  private static native int vmArrayBaseOffset(Class clazz);
-  private static native int vmArrayIndexScale(Class clazz);
+  private static native int vmArrayBaseOffset(Class<?> clazz);
+  private static native int vmArrayIndexScale(Class<?> clazz);
 }