Merge "bootstat: clarify unit."

  // Record the total time from device startup to boot complete, regardless of

  // encryption state.

  // Note: we are recording seconds here even though the field in statsd atom specifies

  // milliseconds.

  boot_event_store.AddBootEventWithValue(boot_complete_prefix, uptime_s.count());

  RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init");