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/545-tracing-and-jit/src/Main.java b/test/545-tracing-and-jit/src/Main.java
index a2d51d5..f365c6e 100644
--- a/test/545-tracing-and-jit/src/Main.java
+++ b/test/545-tracing-and-jit/src/Main.java
@@ -226,7 +226,7 @@
         private static final Method getMethodTracingModeMethod;
         static {
             try {
-                Class c = Class.forName("dalvik.system.VMDebug");
+                Class<?> c = Class.forName("dalvik.system.VMDebug");
                 startMethodTracingMethod = c.getDeclaredMethod("startMethodTracing", String.class,
                         Integer.TYPE, Integer.TYPE, Boolean.TYPE, Integer.TYPE);
                 stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing");