Add GitHub Actions CI

Author: CodeWithBaji

.github/workflows/android.yml

@@ -0,0 +1,37 @@
+name: Android CI
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build & Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '21'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Run unit tests
+        run: ./gradlew test
+
+      - name: Build debug APK
+        run: ./gradlew assembleDebug