Add log source filtering in statsd to filter out spams.

+ Add log source whitelist in StatsdConfig
+ Some changes in UidMap API. Listener needs to be wp instead of sp.
+ Update dogfood app config to have log source
+ Increase the stats service thread pool size to 10 (9+1).

TODO: add unit tests(b/70805664). This unit test takes some time to write.

Test: statsd_test & manual

Change-Id: I129b1cc13db5114db7417580962bd7cc4438519d
diff --git a/cmds/statsd/src/StatsService.h b/cmds/statsd/src/StatsService.h
index e434f65..08fcdac 100644
--- a/cmds/statsd/src/StatsService.h
+++ b/cmds/statsd/src/StatsService.h
@@ -158,7 +158,7 @@
     /**
      * Print the mapping of uids to package names.
      */
-    status_t cmd_print_uid_map(FILE* out);
+    status_t cmd_print_uid_map(FILE* out, const Vector<String8>& args);
 
     /**
      * Flush the data to disk.