Mastodon app is built like that, the release apk is around 3 Mb, ~half of which is resources: https://github.com/mastodon/mastodon-android

Though it's not without compromises — because of Google's stupid policy that "nothing goes into the system unless it needs direct access to privileged or private system components", RecyclerView, ViewPager, and some other basic UI components are still AndroidX libraries that depend on AppCompat for no good reason. I had to fork them to rid them of that dependency: https://github.com/grishka/LiteX

Is this a supported thing to do? No. Do I care about it being unsupported? Also no.