fixed typo in running gradle test

Author: johnnzhou

.github/workflows/android.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Build with Gradle
       run: ./gradlew build
     - name: Run Tests
-      run: ./gradlew app:testDebugUnitTest
+      run: ./gradlew app:testDemoDebugUnitTest
     - name: Generate APK Debug Build with Gradle (Dev)
       if: startsWith(github.ref, 'refs/tags/')
       run: ./gradlew assembleDevDebug