Add generic/gplay assembly

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

.github/workflows/assembleFlavors.yml

@@ -0,0 +1,23 @@
+name: "Assemble"
+
+on:
+  pull_request:
+    branches: [ master, stable-* ]
+
+jobs:
+  flavor:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        flavor: [ Generic, Gplay ]
+    steps:
+      -   uses: actions/checkout@v2
+      -   name: set up JDK 1.8
+          uses: actions/setup-java@v1
+          with:
+            java-version: 1.8
+      -   name: Build ${{ matrix.flavor }}
+          run: |
+            echo "org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError" >> gradle.properties
+            ./gradlew assemble${{ matrix.flavor }}