Add process start time to ProcessMemoryState atom

Also, add the start time to non-additive in statsd.

Bug: 118249210
Test: manually verified values are included in a report
Change-Id: Ib91d4d0f416a1cbd298f4a010e8264a3e8f0ee16
1 file changed
tree: 529f6d50103076af44cc470b0f1f573bb336656c
  1. stats/