[Feature] Always check out submodules if any.

Author: zhanghai

.github/workflows/android.yml

@@ -10,6 +10,8 @@ jobs:
     steps:
     - name: Check out repository
       uses: actions/checkout@v3
+      with:
+        submodules: true
     - name: Set up JDK 17
       uses: actions/setup-java@v3
       with: