config: Add languages from 20150430 deployment plan

• Akan (ak)
• Bambara (bm)
• Chichewa (ny)
• Ewe (ee)
• Fula (ff)
• Kikuyu (ki)
• Kirundi (rn)
• Kongo (kg)
• Luganda (lg)
• Oromo (om)
• Sango (sg)
• Sesotho (st)
• Swati (ss)
• Tigrinya (ti)
• Tsonga (ts)
• Tswana (tn)
• Tumbuka (tum)
• Twi (tw)
• Venda * (ve)

Bug: T97540
Change-Id: I4ba0b2466dd5ddbf031c6707043351920f8e0fe0