android SDK buildable?

Hi i was wondering if anybody succeeded in building this repo using simply the android SDK (without android studio).
This should be possible in theory right?
So I guess my question is: till which degree is this repo dependent on android studio?

## Motivation

In the past I've had a `git push` buildpipeline going on for cordova apps, which was really comfortable for less experienced developers.
The buildservice (gitlab runner) would simply run a shellscript to build+sign the app (by downloading the android SDK, building/signing the apk etc)

Start by reviewing the repository's Android Studio and Android SDK build requirements; no specific files or tests are named in the issue. Document which parts require Android Studio and whether a shell-based build and signing process is supported. Validate the result with a clean build using only the Android SDK.

Written by the indexing model from the issue text.