I have a huge request for the android app that hopefully matches with the goals of Home Assistant in general. I know most people who run Home Assistant are doing so because it allows us to participate with technology and smart homes while not giving the keys to the kingdom to clouds hosted by corporations that monitor and data mine every thing we do behind closed doors in our homes.
The original first one or two versions of the android home assistant app could be run on fully open source android when NOT using any google play or google framework components on the device. That has changed and newer versions of the app will not run without the google framework being in place. Any device that uses fully open source android without installing google components can no longer run the application.
These seem like two parts of the same goal to me. Please take a look at the requirements of the app and see if functionality can still be provided in a way that does not require the google components.