added: upload and download test APK

.github/workflows/test_android.yml

@@ -77,7 +77,12 @@ jobs:
         with:
           name: app-official-release.apk
           path: coopcycle-app-repo/android/app/build/outputs/apk/official/release/app-official-release.apk
-
+      - name: Upload Test APK
+        if: ${{ !cancelled() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-official-release-androidTest.apk
+          path: coopcycle-app-repo/android/app/build/outputs/apk/androidTest/official/release/app-official-release-androidTest.apk
 
   test:
     # https://github.community/t/how-to-stop-github-actions-workflow-to-trigger-when-the-pull-request-is-from-dependabot-preview/116486
@@ -151,11 +156,18 @@ jobs:
         with:
           path: coopcycle-app-repo
 
-      - uses: actions/download-artifact@v4
+      - name: Download build
+        uses: actions/download-artifact@v4
         with:
           name: app-official-release.apk
           path: coopcycle-app-repo/android/app/build/outputs/apk/official/release
 
+      - name: Download Test APK
+        uses: actions/download-artifact@v4
+        with:
+          name: app-official-release-androidTest.apk
+          path: coopcycle-app-repo/android/app/build/outputs/apk/androidTest/official/release
+
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main
         with: