I've used the Linux SailFish OS my on my old Jolla1 phone and I remember I could install and run Android apps via the Alien Dalvik VM.
By now, there is a companent called AppSupport for Linux Platforms which, I quote, (from https://jolla.com/appsupport):
gives any embedded Linux-compatible platform capability to run Android apps
Is it possible to have the Dalvik VM or the Android Runtime, on another component which would enable us to run Android apps on Ubuntu Touch ?