Add maximum timestamp to the payload. am: 8d853bab09 am: d7edd85fdf am: d494488b30 am: 0b6878b7b6  -s ours am: aec8cf10d9  -s ours am: e0e6604695  -s ours am: 783e411d23  -s ours
am: 1d62c61ca3  -s ours

Change-Id: I0a146c95d21846cd742855c46f1c58323585c940