Load Metadata from Disk

Bug: 148280505
Test: bit statsd_test:*
Test: Manual - Added Config, Tested System Server Crash
Test: Manual - Added Config, Tested Device restart
Change-Id: Icd1b1e57bbf24e4a5676820a2b955f2034d4b37d
diff --git a/cmds/statsd/src/metadata_util.h b/cmds/statsd/src/metadata_util.h
index 23e94b0..84a39ff 100644
--- a/cmds/statsd/src/metadata_util.h
+++ b/cmds/statsd/src/metadata_util.h
@@ -24,6 +24,9 @@
 void writeMetricDimensionKeyToMetadataDimensionKey(const MetricDimensionKey& metricKey,
                                                    metadata::MetricDimensionKey* metadataMetricKey);
 
+MetricDimensionKey loadMetricDimensionKeyFromProto(
+        const metadata::MetricDimensionKey& metricDimensionKey);
+
 }  // namespace statsd
 }  // namespace os
 }  // namespace android
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