CI builds android demo project

.github/workflows/demo.yaml

@@ -0,0 +1,34 @@
+name: Demo CI
+on: [ push, pull_request ]
+jobs:
+  demo-android-build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: demo
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Java
+        uses: actions/setup-java@v3
+        with:
+          java-version: 17
+          distribution: adopt
+          cache: gradle
+
+      - name: Validate Gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+
+      - name: Setup Node  
+        uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+
+      - name: Run npm Install
+        run: npm install
+
+      - name: Build application
+        run: |
+             cd android
+             ./gradlew assembleDebug