bump api level down to 28 to try and fix idk

Author: tmthecoder

.github/workflows/dargon2_flutter_tests.yml

@@ -30,7 +30,7 @@ jobs:
           path: |
             ~/.android/avd/*
             ~/.android/adb*
-          key: avd-29
+          key: avd-28
       - name: Download Flutter
         uses: subosito/flutter-action@v2
         with:
@@ -41,7 +41,7 @@ jobs:
       - name: Run Integration Tests
         uses: reactivecircus/[email protected]
         with:
-          api-level: 29
+          api-level: 28
           ndk: 20.1.5948944
           working-directory: dargon2_flutter/dargon2_flutter/example
           script: flutter test integration_test/