Add CI workflow for Shrine sample

Author: cy245

.github/workflows/build-shrine.yml

@@ -0,0 +1,58 @@
+# Workflow name
+name: Build Shrine Sample
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set Up JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: '17'
+          cache: 'gradle'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Install Android SDK Platform VanillaIceCream
+        run: |
+          echo "y" | $ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager --licenses > /dev/null
+          echo "y" | $ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager "platforms;android-35"
+
+      # The sample includes a keystore.properties.template.
+      # For a CI build, we might need to provide a dummy or generated keystore.
+      # For now, let's assume the build works without a specific signing config for debug.
+      # If it requires specific signing for debug, this might fail or need adjustment.
+      - name: Create dummy keystore.properties if not exists
+        run: |
+          if [ ! -f Shrine/keystore.properties ]; then
+            echo "Creating dummy keystore.properties for CI build"
+            echo "storeFile=debug.keystore" > Shrine/keystore.properties
+            echo "storePassword=android" >> Shrine/keystore.properties
+            echo "keyAlias=androiddebugkey" >> Shrine/keystore.properties
+            echo "keyPassword=android" >> Shrine/keystore.properties
+          fi
+          # Ensure a debug.keystore exists if not provided by checkout
+          if [ ! -f Shrine/debug.keystore ]; then
+            echo "Generating dummy debug.keystore for CI build"
+            keytool -genkey -v -keystore Shrine/debug.keystore -storepass android -alias androiddebugkey -keypass android -keyalg RSA -keysize 2048 -validity 10000 -dname "CN=Android Debug,O=Android,C=US"
+          fi
+        working-directory: . # Run from checkout root so Shrine/ path is correct
+
+      - name: Make gradlew executable
+        run: chmod +x ./gradlew
+        working-directory: ./Shrine
+
+      - name: Build Shrine app
+        working-directory: ./Shrine
+        run: ./gradlew app:assembleDebug