Erlotinib and Cisplatin in Treating Patients With Recurrent or Metastatic Head and Neck Cancer

head and neck cancer, recurrent metastatic squamous neck cancer occult primary, neck cancer with occult primary squamous carcinoma, stage iv squamous cell carcinoma of the lip and oral cavity, recurrent squamous cell carcinoma of the lip and oral cavity, stage iv squamous cell carcinoma of the oropharynx, recurrent squamous cell carcinoma of the oropharynx, stage iv squamous cell carcinoma of the nasopharynx, recurrent squamous cell carcinoma of the nasopharynx, stage iv squamous cell carcinoma of the hypopharynx, recurrent squamous cell carcinoma of the hypopharynx, stage iv squamous cell carcinoma of the larynx