ART: Add dex::StringIndex

Add abstraction for uint32_t string index.

Test: m test-art-host
Change-Id: I917c2881702fe3df112c713f06980f2278ced7ed
diff --git a/compiler/debug/elf_debug_info_writer.h b/compiler/debug/elf_debug_info_writer.h
index 0a4f094..30d4b47 100644
--- a/compiler/debug/elf_debug_info_writer.h
+++ b/compiler/debug/elf_debug_info_writer.h
@@ -53,7 +53,7 @@
       uint32_t parameters_size = DecodeUnsignedLeb128(&stream);
       for (uint32_t i = 0; i < parameters_size; ++i) {
         uint32_t id = DecodeUnsignedLeb128P1(&stream);
-        names.push_back(mi->dex_file->StringDataByIdx(id));
+        names.push_back(mi->dex_file->StringDataByIdx(dex::StringIndex(id)));
       }
     }
   }