Add command to clear puller cache

Test: manual test
Change-Id: Id1fa48b5a6f2200d22f4a746763f65d0c8d65f72
diff --git a/cmds/statsd/src/StatsService.h b/cmds/statsd/src/StatsService.h
index be20893..fd3ed1d 100644
--- a/cmds/statsd/src/StatsService.h
+++ b/cmds/statsd/src/StatsService.h
@@ -197,6 +197,11 @@
      */
     status_t cmd_dump_memory_info(FILE* out);
 
+  /*
+     * Clear all puller cached data
+     */
+  status_t cmd_clear_puller_cache(FILE* out);
+
     /**
      * Update a configuration.
      */