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/044-proxy/src/Clash4.java b/test/044-proxy/src/Clash4.java
index 1bfb37f..ca5c3ab 100644
--- a/test/044-proxy/src/Clash4.java
+++ b/test/044-proxy/src/Clash4.java
@@ -29,7 +29,7 @@
 
         try {
             Proxy.newProxyInstance(Clash.class.getClassLoader(),
-                new Class[] {
+                new Class<?>[] {
                     Interface4a.class,
                     Interface4aa.class,
                     Interface4base.class,