to build the docker run
$ docker compose build && docker compose up --force-recreate
ps> docker compose build && docker compose up --force-recreate
the results files will be copied
to find files go to pjsip-android-docker:/pjsip/build/swig/java/android/pjsua2/src/main/jniLibs/<Architecture>
andpjsip-android-docker:/pjsip/build/$FOLDER/pjsua2
is bind to /pjsip/pjproject/pjsip-apps/src/swig/java/android/pjsua2