chore: GitHub Actions

.github/workflows/build.yml

@@ -0,0 +1,39 @@
+name: Android CI
+
+on:
+  push:
+    branches: [ "master", "4.0-dev" ]
+  pull_request:
+    branches: [ "master", "4.0-dev" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: "11"
+          distribution: "temurin"
+          cache: gradle
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew packageRelease
+
+      - name: Upload Package
+        uses: actions/upload-artifact@v3.1.2
+        with:
+          name: package
+          path: ${{ github.workspace }}/build/outputs/apk/release/*.apk
+
+      - name: Upload Mapping
+        uses: actions/upload-artifact@v3.1.2
+        with:
+          name: mapping
+          path: ${{ github.workspace }}/build/outputs/apk/mapping