.github: Add workflow for building APK

Change-Id: Ic1ee21466a59964a58b896189e935b3a12348a54
Signed-off-by: Kizziama <[email protected]>

.github/workflows/build.yaml

@@ -0,0 +1,33 @@
+name: Build APK
+
+env:
+  APKTOOL_VER: 2.6.1
+
+on:
+  push:
+    branches: 
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - uses: actions/setup-java@v3
+      with:
+        distribution: 'adopt-hotspot'
+        java-version: '8'
+
+    - uses: robinraju/[email protected]
+      with:
+        repository: 'iBotPeaches/Apktool'
+        tag: 'v${{ env.APKTOOL_VER }}'
+        fileName: 'apktool_${{ env.APKTOOL_VER }}.jar'
+
+    - run: java -jar apktool_${{ env.APKTOOL_VER }}.jar b .
+
+    - uses: actions/upload-artifact@v3
+      with:
+        name: APK
+        path: dist/QtiTelephony.apk