ci: add workflow for Android tests

.github/workflows/android.yml

@@ -5,13 +5,23 @@ on:
     branches: [ master ]
     paths-ignore:
       - "**.md"
+      - ".idea/**"
+      - ".gitignore"
+      - ".gitmodules"
+
   pull_request:
     branches: [ master ]
 
+concurrency:
+  group: build-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
 
-  ci-build:
+  build:
     runs-on: ubuntu-latest
+    timeout-minutes: 30
+
     steps:
 
     - name: Checkout code
@@ -53,9 +63,62 @@ jobs:
         retention-days: 30
 
     - name: Upload build reports
-      if: always()
+      if: ${{ !cancelled() }}
       uses: actions/upload-artifact@v4
       with:
         name: build-reports
         path: app/build/reports
         retention-days: 30
+
+  androidTest:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        api-level: [26, 33]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+
+      - name: Enable KVM group perms
+        run: |
+          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+          sudo udevadm control --reload-rules
+          sudo udevadm trigger --name-match=kvm
+
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'zulu'
+
+      - uses: gradle/actions/setup-gradle@v3
+
+      - uses: actions/cache@v4
+        id: avd-cache
+        with:
+          path: |
+            ~/.android/avd/*
+            ~/.android/adb*
+          key: avd-${{ matrix.api-level }}
+
+      - name: create AVD and generate snapshot for caching
+        if: steps.avd-cache.outputs.cache-hit != 'true'
+        uses: reactivecircus/android-emulator-runner@v2
+        with:
+          api-level: ${{ matrix.api-level }}
+          arch: x86_64
+          force-avd-creation: false
+          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          disable-animations: true
+          script: echo "Generated AVD snapshot for caching."
+
+      - uses: reactivecircus/android-emulator-runner@v2
+        with:
+          api-level: ${{ matrix.api-level }}
+          arch: x86_64
+          force-avd-creation: false
+          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          disable-animations: true
+          script: ./gradlew connectedFdroidDebugAndroidTest