ART: Add dex::TypeIndex

Add abstraction for uint16_t type index.

Test: m test-art-host
Change-Id: I47708741c7c579cbbe59ab723c1e31c5fe71f83a
diff --git a/runtime/dex_file_verifier_test.cc b/runtime/dex_file_verifier_test.cc
index 3801c22..0e0929f 100644
--- a/runtime/dex_file_verifier_test.cc
+++ b/runtime/dex_file_verifier_test.cc
@@ -26,6 +26,7 @@
 #include "base/macros.h"
 #include "common_runtime_test.h"
 #include "dex_file-inl.h"
+#include "dex_file_types.h"
 #include "leb128.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread-inl.h"
@@ -155,7 +156,7 @@
       "method_id_class_idx",
       [](DexFile* dex_file) {
         DexFile::MethodId* method_id = const_cast<DexFile::MethodId*>(&dex_file->GetMethodId(0));
-        method_id->class_idx_ = 0xFF;
+        method_id->class_idx_ = dex::TypeIndex(0xFF);
       },
       "could not find declaring class for direct method index 0");