Adding additional wifi power metrics to wifi power metrics

  // Amount of time wifi is in tx (ms)

  optional int64 tx_time_ms = 5;

  // Amount of time kernel is active because of wifi data (ms)

  optional int64 wifi_kernel_active_time_ms = 6;

  // Number of packets sent (tx)

  optional int64 num_packets_tx = 7;

  // Number of bytes sent (tx)

  optional int64 num_bytes_tx = 8;

  // Number of packets received (rx)

  optional int64 num_packets_rx = 9;

  // Number of bytes sent (rx)

  optional int64 num_bytes_rx = 10;

  // Amount of time wifi is in sleep (ms)

  optional int64 sleep_time_ms = 11;

  // Amount of time wifi is scanning (ms)

  optional int64 scan_time_ms = 12;

}

// Metrics for Wifi Wake