Add SafetyNet logging for payload timestamp error.

Bug: 36232423
Test: mma

Merged-In: Ica752e24e78e84350e13c66a2a0a56092f232d0b
Change-Id: Ica752e24e78e84350e13c66a2a0a56092f232d0b
(cherry picked from commit b75539b3ee05aa07b107fd711f010af54a80b0f2)
(cherry picked from commit c2edd69550306c42b8140ffe3035111fcbe52181)
Exempt-From-Owner-Approval: OWNERS file outdated in nyc-*
diff --git a/update_attempter_android.cc b/update_attempter_android.cc
index e42f569..66cb600 100644
--- a/update_attempter_android.cc
+++ b/update_attempter_android.cc
@@ -26,6 +26,7 @@
 #include <brillo/bind_lambda.h>
 #include <brillo/message_loops/message_loop.h>
 #include <brillo/strings/string_utils.h>
+#include <log/log.h>
 
 #include "update_engine/common/constants.h"
 #include "update_engine/common/libcurl_http_fetcher.h"
@@ -262,6 +263,9 @@
     DeltaPerformer::ResetUpdateProgress(prefs_, false);
 
     LOG(INFO) << "Update successfully applied, waiting to reboot.";
+  } else if (code == ErrorCode::kPayloadTimestampError) {
+    // SafetyNet logging, b/36232423
+    android_errorWriteLog(0x534e4554, "36232423");
   }
 
   TerminateUpdateAndNotify(code);