Merge "Emit event log message when switching users." into jb-mr1.1-dev

Author: jsharkey

services/java/com/android/server/am/ActivityManagerService.java

@@ -14229,6 +14229,7 @@ public void performReceive(Intent intent, int resultCode,
                     startHomeActivityLocked(userId);
                 }
 
+                EventLogTags.writeAmSwitchUser(userId);
                 getUserManagerLocked().userForeground(userId);
                 sendUserSwitchBroadcastsLocked(oldUserId, userId);
                 if (needStart) {

services/java/com/android/server/am/EventLogTags.logtags

@@ -83,3 +83,6 @@ option java_package com.android.server.am
 30039 am_crash (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Exception|3),(Message|3),(File|3),(Line|1|5)
 # Log.wtf() called
 30040 am_wtf (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Tag|3),(Message|3)
+
+# User switched
+30041 am_switch_user (id|1|5)