Allow default state, reset state, and nesting for binary states

Every state atom can have a customized default state and reset state by
annotating atoms.proto.

Binary state atoms (such as WakelockStateChanged)  can turn on nested
counting by annotating atoms.proto as well.

Generated atoms_info.h before change: https://paste.googleplex.com/4626190063108096
Generated atoms_info.h after change: https://paste.googleplex.com/5410938863747072
Generated atoms_info.cpp before change: https://paste.googleplex.com/5726061016907776
Generated atoms_info.cpp after change: https://paste.googleplex.com/5540983737417728

Test: bit statsd_test:*
Change-Id: I845616f103e013a7927de869b8e8228cfb244090
diff --git a/tools/stats_log_api_gen/Collation.h b/tools/stats_log_api_gen/Collation.h
index 87d4d5d..65d8e3e 100644
--- a/tools/stats_log_api_gen/Collation.h
+++ b/tools/stats_log_api_gen/Collation.h
@@ -88,6 +88,9 @@
 
     vector<int> primaryFields;
     int exclusiveField = 0;
+    int defaultState = INT_MAX;
+    int resetState = INT_MAX;
+    bool nested;
 
     int uidField = 0;