Add StatsMetadataList proto

Bug: 148280505
Test: m -j
Change-Id: I84da0cd9c79dc1073c40a439fe2acff2e3fbc7ec
diff --git a/cmds/statsd/Android.bp b/cmds/statsd/Android.bp
index 4529dff..e4a22e1 100644
--- a/cmds/statsd/Android.bp
+++ b/cmds/statsd/Android.bp
@@ -97,6 +97,7 @@
         "src/stats_log_util.cpp",
         "src/statscompanion_util.cpp",
         "src/statsd_config.proto",
+        "src/statsd_metadata.proto",
         "src/StatsLogProcessor.cpp",
         "src/StatsService.cpp",
         "src/storage/StorageManager.cpp",