Added index type of dex byte instructions.

Rationale:
The information was already in the instruction_list but not
exposed as enum through a getter. This CL adds that ability.
This information is needed by the upcoming Art-based dexdump.

NOTE:
Added "Index" to the enum constants naming convention.

NOTE:
Fixed few incorrect quickened entries in instruction_list.

Bug: 17442393

Change-Id: Ica18ae43135f78f29e9832f5a101d497e54724cf
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 4fc184e..9f6dc9a 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -150,6 +150,7 @@
   runtime/class_linker_test.cc \
   runtime/dex_file_test.cc \
   runtime/dex_file_verifier_test.cc \
+  runtime/dex_instruction_test.cc \
   runtime/dex_instruction_visitor_test.cc \
   runtime/dex_method_iterator_test.cc \
   runtime/entrypoints/math_entrypoints_test.cc \