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/118-noimage-dex2oat/src/Main.java b/test/118-noimage-dex2oat/src/Main.java
index dba9166..cc19107 100644
--- a/test/118-noimage-dex2oat/src/Main.java
+++ b/test/118-noimage-dex2oat/src/Main.java
@@ -51,7 +51,7 @@
     private static final Method isBootClassPathOnDiskMethod;
     static {
         try {
-            Class c = Class.forName("dalvik.system.VMRuntime");
+            Class<?> c = Class.forName("dalvik.system.VMRuntime");
             getCurrentInstructionSetMethod = c.getDeclaredMethod("getCurrentInstructionSet");
             isBootClassPathOnDiskMethod = c.getDeclaredMethod("isBootClassPathOnDisk",
                                                               String.class);