test/trace_processor/process_metadata_matching.textproto

packet {
  process_tree {
    processes {
      pid: 1
      ppid: 0
      cmdline: "init"
      uid: 0
    }
    processes {
      pid: 2
      ppid: 1
      cmdline: "system_server"
      uid: 1000
    }
    processes {
      pid: 3
      ppid: 1
      cmdline: "com.google.android.gms"
      uid: 10100
    }
    processes {
      pid: 4
      ppid: 1
      cmdline: "com.google.android.gms.persistent"
      uid: 10100
    }
  }
}
packet {
  packages_list {
    packages {
      name: "com.google.android.gms"
      uid: 10100
      version_code: 1234
    }
    packages {
      name: "com.google.android.gsf"
      uid: 10100
      version_code: 1
    }
  }
}