Added Github action.

.github/workflows/master.yml

@@ -0,0 +1,33 @@
+name: Android CI - Publish Apk
+
+on: 
+  push:
+    branches: 
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Make Gradle executable
+        run: chmod +x ./gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew build
+
+      - name: Build Debug APK
+        run: ./gradlew assembleDebug
+        
+      - name: Debug APK Publisher
+        uses: ShaunLWM/action-release-debugapk@0.0.5
+        env:
+          GITHUB_TOKEN: ${{ secrets.TOKEN }}
+          APP_FOLDER: app
+          RELEASE_TITLE: New Build