upload artifacts

Author: Kudo

.github/workflows/build_and_test.yml

@@ -96,3 +96,8 @@ jobs:
     - name: log
       run: |
         cat test/android/app/build/reports/androidTests/connected/index.html
+
+    - uses: actions/upload-artifact@v2
+      with:
+        name: test
+        path: test/android/app/build/outputs/apk