Add StatsLog*Manager for logging.
Bug: 113043444

Verification: (19) is our event classifier number
11-05 11:24:28.188   932   994 I statsd  : { 1541445868000000000 766293363001 (19)0x10000->1[I] 0x20000->0[I] 0x30000->0[I] 0x40000->[S] 0x50000->1[I]  }

Change-Id: I75403837f9fa8e51efa012fb708bce7efc9c4488
diff --git a/res/values/config.xml b/res/values/config.xml
index 5e83ab7..4ab2274 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -84,6 +84,7 @@
     <string name="icon_provider_class" translatable="false"></string>
     <string name="drawable_factory_class" translatable="false"></string>
     <string name="user_event_dispatcher_class" translatable="false"></string>
+    <string name="stats_log_manager_class" translatable="false"></string>
     <string name="app_transition_manager_class" translatable="false"></string>
     <string name="instant_app_resolver_class" translatable="false"></string>
     <string name="main_process_initializer_class" translatable="false"></string>