Changed android target sdk version

Android target sdk version in AndroidManifest.xml now matches the OUYA
(version 16).
Revert "Changed android api level to 16"

This reverts commit 04e70c124c797015b17435cfb598d60c2d31f472.
Revert "Revert "Changed android api level to 16""

This reverts commit 3550a6b4cd3dfc6e1d507fa9fe72a548af5cdca9.