Apart from my issues with Elon and my dislike for Tesla: Android won’t save you here, because it’s via Bluetooth. The Android AppSupport doesn’t do anything Bluetooth at the moment, so I don’t think you’ll be able to use your phone as key.
EDIT: possibly the approach of @rdomschk works: Potential Bluetooth Support in the Android App Support (AAS) - #206 by rdomschk, but that might not be the most convenient from a Sailfish-usability POV. Thanks to @pherjung for pointing that out to me 