Add support for multi train logging

Test: atest GtsStatsdHostTestCases
Change-Id: I4ca7089347d6dfab8a33c07acd5ef9c252413ec9
diff --git a/cmds/statsd/src/StatsLogProcessor.h b/cmds/statsd/src/StatsLogProcessor.h
index c49f2e0..42e5676 100644
--- a/cmds/statsd/src/StatsLogProcessor.h
+++ b/cmds/statsd/src/StatsLogProcessor.h
@@ -18,6 +18,7 @@
 
 #include <gtest/gtest_prod.h>
 #include "config/ConfigListener.h"
+#include "logd/LogEvent.h"
 #include "metrics/MetricsManager.h"
 #include "packages/UidMap.h"
 #include "external/StatsPullerManager.h"
@@ -199,10 +200,18 @@
     // Handler over the binary push state changed event.
     void onBinaryPushStateChangedEventLocked(LogEvent* event);
 
+    // Handler over the watchdog rollback occurred event.
+    void onWatchdogRollbackOccurredLocked(LogEvent* event);
+
     // Updates train info on disk based on binary push state changed info and
     // write disk info into parameters.
-    void getAndUpdateTrainInfoOnDisk(int32_t state, int64_t* trainVersionCode,
-                                     string* trainName, std::vector<int64_t>* experimentIds);
+    void getAndUpdateTrainInfoOnDisk(bool is_rollback, InstallTrainInfo* trainInfoIn);
+
+    // Gets experiment ids on disk for associated train and updates them
+    // depending on rollback type. Then writes them back to disk and returns
+    // them.
+    std::vector<int64_t> processWatchdogRollbackOccurred(const int32_t rollbackTypeIn,
+                                                          const string& packageName);
 
     // Reset all configs.
     void resetConfigsLocked(const int64_t timestampNs);