Merge "Specify --max_timestamp when calling brillo_update_payload." into nyc-dr1-dev am: 21a26c9843 am: 64e3da49be am: ed62f299b5 am: ea43cfbea1  -s ours am: ca09e189e9  -s ours
am: 96df5e3ef8  -s ours

Change-Id: I26899877793a29934ab21a8297e22da2e6a23b01