Merge "Specify --max_timestamp when calling brillo_update_payload." into nyc-dev am: 258f04a556  -s ours am: 478e5c3ff4  -s ours am: 2b7db24048  -s ours am: 289910cb63  -s ours
am: 52eb6cbd46  -s ours

Change-Id: I1ce0c175236164eef49b9dc593e53c6e2ef34190