Check for non-free libraries (#3189)

.github/workflows/android.yml

@@ -41,6 +41,10 @@ jobs:
           sudo update-alternatives --auto java
       - name: Build
         run: ./gradlew assemble${{ matrix.flavor }}Release
+      - name: Check for non-free libraries
+        run: |
+          wget -q https://codeberg.org/Katastima/apkscanner/releases/download/v0.0.7/apk-scanner_v0.0.7.jar
+          java -jar apk-scanner_v0.0.7.jar scan-apk "$(echo 'app/build/outputs/apk/${{ matrix.flavor }}/release/app-${{ matrix.flavor }}-release-unsigned.apk' | tr '[:upper:]' '[:lower:]')"
       - name: Check lint
         run: ./gradlew lint${{ matrix.flavor }}Release
       - name: Run unit tests