Revert "Use Guava 16 which does not have compatibility issues"

Turns out Smartsprites uses Closeables.closeQuietly which is deprecated in 15 and removed in Guava 16

This reverts commit 1159db580f350493ffcf6628c05924458881ebb2.

Change-Id: Ica9b4e175041b00a15a320b7c3fcea5b6d42b349