Integrate Legacy DRM metrics with statsd

Bug: 134789967
Test: statsd test_drive
Change-Id: I113c74ef63b52ab12063523d133ade15956ce03e
diff --git a/services/mediaanalytics/iface_statsd.h b/services/mediaanalytics/iface_statsd.h
index f85d303..014929b 100644
--- a/services/mediaanalytics/iface_statsd.h
+++ b/services/mediaanalytics/iface_statsd.h
@@ -30,5 +30,6 @@
 
 extern bool statsd_mediadrm(MediaAnalyticsItem *);
 extern bool statsd_widevineCDM(MediaAnalyticsItem *);
+extern bool statsd_drmmanager(MediaAnalyticsItem *);
 
 } // namespace android