Thanks for your help in testing BLE beta support for Android. If you’re having problems with making a BLE connection, please file a support ticket with http://bit.ly/ZwiftSupport so we can work with you to identify where the problem might be.
Controllable trainers are not yet supported over BLE - we’re working on it, but for now you can continue to use the KICKR as a controllable trainer over ANT+, or just use the KICKR as a power meter over BLE.