Create app_flow.yml

This is the initial CICD set up

.github/workflows/app_flow.yml

@@ -0,0 +1,31 @@
+name: App Flow
+
+on:
+push:
+branches:
+- main
+pull_request:
+branches:
+- main
+
+jobs:
+build:
+name: Build and Test
+runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          java-version: '11'
+
+      - name: Set up Android SDK
+        uses: actions/setup-android@v2
+        with:
+          sdk-version: '31'
+
+      - name: Build with Gradle
+        run: ./gradlew build