Rename enum in ArtDexMetadataType with appropriate prefix.

Bug: 177694884
Test: m
Change-Id: Iccf1978c47f48322aaedd55ac0f94d15f1423f44
diff --git a/runtime/metrics/statsd.cc b/runtime/metrics/statsd.cc
index ea6cd5c..e4de242 100644
--- a/runtime/metrics/statsd.cc
+++ b/runtime/metrics/statsd.cc
@@ -127,7 +127,7 @@
                               // constant is not present in all branches)
           datum_id.value(),
           static_cast<int64_t>(value),
-          statsd::ART_DATUM_REPORTED__DEX_METADATA_TYPE__UNKNOWN_DEX_METADATA);
+          /*dex_metadata_type=*/0);  // Update the value once the enum is changed
     }
   }