test/trace_processor/config_metadata.textproto

packet {
  clock_snapshot {
    clocks {
      clock_id: 6
      timestamp: 101000002
    }
    clocks {
      clock_id: 128
      timestamp: 2
    }
  }
  timestamp: 101000002
}
packet {
  trace_config {
    trace_uuid_msb: 1314564453825188563
    trace_uuid_lsb: -6605018796207623390
  }
}
packet {
  system_info {
    android_build_fingerprint: "the fingerprint"
  }
}