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/496-checker-inlining-and-class-loader/src/Main.java b/test/496-checker-inlining-and-class-loader/src/Main.java
index 8de6318..91cf0a0 100644
--- a/test/496-checker-inlining-and-class-loader/src/Main.java
+++ b/test/496-checker-inlining-and-class-loader/src/Main.java
@@ -69,7 +69,7 @@
             "loadClassBinaryName", String.class, ClassLoader.class, List.class);
 
         if (dexFile != null) {
-          Class clazz = (Class)method.invoke(dexFile, className, this, null);
+          Class<?> clazz = (Class<?>)method.invoke(dexFile, className, this, null);
           if (clazz != null) {
             return clazz;
           }
@@ -123,7 +123,7 @@
 public class Main {
   public static void main(String[] args) throws Exception {
     MyClassLoader o = new MyClassLoader();
-    Class foo = o.loadClass("LoadedByMyClassLoader");
+    Class<?> foo = o.loadClass("LoadedByMyClassLoader");
     Method m = foo.getDeclaredMethod("bar");
     m.invoke(null);
   }