新增Android ci

.github/workflows/android.yml

@@ -0,0 +1,25 @@
+name: Android CI
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    steps:
+
+    - name: 下载源码
+      uses: actions/checkout@v1
+
+    - name: 配置JDK
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+        cache: gradle
+
+    - name: 下载submodule源码
+      run: git submodule update --init
+
+    - name: 赋予gradlew文件可执行权限
+      run: chmod +x ./Android/gradlew
+
+    - name: 编译
+      run: cd Android && ./gradlew build