1 This directory contains tools and code associated with time zone "distro" 2 files. 3 4 A distro file is a zip archive containing the files needed to update the time 5 zone rules on a correctly configured Android device, i.e. files required by 6 ICU4J / ICU4C / libcore and bionic libraries. 7 8 The .zip file also contains versioning information that can be used to prevent 9 a distro file being installed on an unsupported device. 10