add github action

.github/workflows/android.yml

@@ -17,7 +17,7 @@ jobs:
     - name: set up JDK 1.8
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
         
     - name: Build Debug APK
       run: ./gradlew assembleDebug