Persist data to disk when system shuts down

This is a cherry-pick from master to pi-dev.

Test: local test

BUG: b/112432890
Change-Id: Ie360f5c8df53d3b5b04f23df43ab8dc14b69ae26
Merged-In: Iaed318671a719cc366d4e6be9f77270147ba6596
diff --git a/cmds/statsd/src/StatsLogProcessor.h b/cmds/statsd/src/StatsLogProcessor.h
index b175b3c..9ed4ed0 100644
--- a/cmds/statsd/src/StatsLogProcessor.h
+++ b/cmds/statsd/src/StatsLogProcessor.h
@@ -40,7 +40,8 @@
     GET_DATA_CALLED = 4,
     ADB_DUMP = 5,
     CONFIG_RESET = 6,
-    STATSCOMPANION_DIED = 7
+    STATSCOMPANION_DIED = 7,
+    TERMINATION_SIGNAL_RECEIVED = 8
 };
 
 class StatsLogProcessor : public ConfigListener {