Simplify Github Action

.github/workflows/android.yml

@@ -1,20 +1,18 @@
 name: Android CI with Gradle
 
 on:
-  push:
-    branches:
-      - '*'
   pull_request:
-    branches: [ master ]
+  push:
+  workflow_dispatch:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+        with:
+          submodules: recursive
       - name: set up JDK 11
         uses: actions/setup-java@v3.10.0
         with:
@@ -29,10 +27,6 @@ jobs:
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
-      - name: Checkout submodules # checkout rest
-        shell: bash
-        run: |
-          git submodule update --init
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: Build with Gradle