test/trace_processor/power_rails_custom_clock.textproto

packet {
  clock_snapshot {
    clocks {
      clock_id: 6
      timestamp: 101000002
    }
    clocks {
      clock_id: 128
      timestamp: 2
    }
  }
  timestamp: 101000002
}
packet {
  power_rails {
    rail_descriptor {
      index: 4
      rail_name: "test_rail"
      subsys_name: "test_subsys"
      sampling_rate: 1023
    }
  }
}
packet {
  timestamp: 3000000
  power_rails {
    energy_data {
      index: 4
      energy: 333
    }
  }
  timestamp_clock_id: 128
}
packet {
  timestamp: 5000000
  power_rails {
    energy_data {
      index: 4
      energy: 666
    }
  }
  timestamp_clock_id: 128
}
packet {
  power_rails {
    energy_data {
      index: 4
      timestamp_ms: 106
      energy: 999
    }
    energy_data {
      index: 4
      timestamp_ms: 109
      energy: 0
    }
  }
}