try building this

.gitea/workflows/build-android.yaml

@@ -0,0 +1,22 @@
+on: push
+name: Test, Build and Release apk
+jobs:
+  build:
+    name: Build APK
+    runs-on: k8s
+    steps:
+    - uses: https://github.com/actions/checkout@v1
+    - uses: https://github.com/actions/setup-java@v1
+      with:
+        java-version: '12.x'
+    - uses: https://github.com/subosito/flutter-action@v1
+      with:
+        flutter-version: '1.7.8+hotfix.4'
+    - run: flutter pub get
+    # - run: flutter test
+    - run: flutter build apk --debug --split-per-abi
+    - name: Push APK to Releases
+      uses: https://github.com/ncipollo/release-action@v1
+      with:
+        artifacts: "build/app/outputs/apk/debug/*.apk"
+        token: ${{ secrets.TOKEN }}