Airship Android SDK Migration Guides SDK 17.x to 18.x SDK 16.x to 17.x SDK 15.x to 16.x SDK 14.x to 15.x SDK 14.x to 14.5 SDK 13.x to 14.x SDK 12.x to 13.x SDK 11.x to 12.x SDK 10.x to 11.x SDK 9.x to 10.x SDK 8.x to 9.x Older versions FCM Migration Guide