github: Add android build

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

.github/workflows/android_build.yml

@@ -0,0 +1,27 @@
+name: Android build
+
+on: [push, pull_request]
+
+defaults:
+  run:
+    shell: bash
+jobs:
+  build:
+    runs-on:  ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Build
+        run: |
+          mkdir build
+          sudo docker run -t --mount type=bind,source=$PWD,target=/home/user/qgroundcontrol --user root williangalvani/qgc-android-build
+
+      - name: Save artifact
+        uses: actions/upload-artifact@master
+        with:
+          name: QGroundControl.apk
+          path: build/dist/build/outputs/apk/dist-release-unsigned.apk