Rename "stats_events" as "atom".

Also make atom WakelockStateChanged use the "Type" enum instead of int32.

Test: Unittests are passing. Statsd is working.

Change-Id: I0909e2d97297f78996a81366d66aae62d5bf5ce1
diff --git a/tools/stats_log_api_gen/main.cpp b/tools/stats_log_api_gen/main.cpp
index 6350b72..eb29150 100644
--- a/tools/stats_log_api_gen/main.cpp
+++ b/tools/stats_log_api_gen/main.cpp
@@ -2,7 +2,7 @@
 
 #include "Collation.h"
 
-#include "frameworks/base/cmds/statsd/src/stats_events.pb.h"
+#include "frameworks/base/cmds/statsd/src/atoms.pb.h"
 
 #include <set>
 #include <vector>
@@ -18,7 +18,7 @@
 namespace android {
 namespace stats_log_api_gen {
 
-using android::os::statsd::StatsEvent;
+using android::os::statsd::Atom;
 
 // TODO: Support WorkSources
 
@@ -582,7 +582,7 @@
 
     // Collate the parameters
     Atoms atoms;
-    int errorCount = collate_atoms(StatsEvent::descriptor(), &atoms);
+    int errorCount = collate_atoms(Atom::descriptor(), &atoms);
     if (errorCount != 0) {
         return 1;
     }