Make a debug build action

.github/workflows/android-debug.yml

@@ -0,0 +1,51 @@
+name: Android Pull Request & Master CI
+
+on:
+  push:
+    branches:
+      - 'master'
+
+jobs:
+  test:
+    name: Run Unit Tests
+    runs-on: ubuntu-18.04
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Unit tests
+        run: bash ./gradlew test --stacktrace
+
+  apk:
+    name: Generate APK
+    runs-on: ubuntu-18.04
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Build debug APK
+        run: bash ./gradlew assembleRelease --stacktrace
+      - name: Sign Android release
+        uses: r0adkll/sign-android-release@v1
+        with:
+          # The directory to find your release to sign
+          releaseDirectory: app/build/outputs/apk/release
+          # The key used to sign your release in base64 encoded format
+          signingKeyBase64: ${{ secrets.SIGNING_KEY }}
+          # The key alias
+          alias: ${{ secrets.ALIAS }}
+          # The password to the keystore
+          keyStorePassword: ${{ secrets.KEY_STORE_PASSWORD }}
+          # The password for the key
+          keyPassword: ${{ secrets.KEY_PASSWORD }}
+      - name: Upload APK
+        uses: actions/upload-artifact@v1
+        with:
+          name: TachiyomiSY-${{ github.sha }}
+          path: $SIGNED_RELEASE_FILE