Add GitHub Actions script

.github/workflows/pull_requests.yml

@@ -0,0 +1,70 @@
+name: Android Debug Build
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - name: Cache gradle files
+        uses: actions/cache@v1
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle
+
+      - name: Cache build files
+        uses: actions/cache@v1
+        with:
+          path: build
+          key: ${{ runner.OS }}-build-${{ hashFiles('**/*.kt') }}
+          restore-keys: |
+            ${{ runner.OS }}-build-${{ env.cache-name }}-
+            ${{ runner.OS }}-build-
+
+      - name: Unit tests
+        run: ./gradlew -Pci test --stacktrace
+
+  build:
+    name: Debug Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - name: Cache gradle files
+        uses: actions/cache@v1
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle
+
+      - name: Cache build files
+        uses: actions/cache@v1
+        with:
+          path: build
+          key: ${{ runner.OS }}-build-${{ hashFiles('**/*.kt') }}
+          restore-keys: |
+            ${{ runner.OS }}-build-${{ env.cache-name }}-
+            ${{ runner.OS }}-build-
+
+      - name: Build with Gradle
+        run: ./gradlew -Pci assembleDebug
+        env:
+          MAP_KEY: ${{ secrets.MAP_KEY }}