chore(.github): add android workflow

.github/workflows/android.yml

@@ -0,0 +1,52 @@
+on: [push, pull_request]
+
+name: CI
+
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    env:
+      ANDROID_SDK_ROOT: ${{ github.workspace }}/android-sdk
+      ANDROID_NDK_HOME: ${{ github.workspace }}/android-ndk
+      ANDROID_HOME: ${{ github.workspace }}/android-sdk
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up JDK
+      uses: actions/setup-java@v3
+      with:
+        distribution: 'zulu'
+        java-version: '11'
+
+    - name: Set up Android SDK
+      uses: android-actions/setup-android@v2
+      with:
+        api-level: 30
+        build-tools: 30.0.3
+        ndk: 21.3.6528147
+
+    - name: Install Rust
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+        components: rustfmt, clippy
+
+    - name: Add Android targets
+      run: rustup target add aarch64-linux-android
+
+    - name: Install cargo-ndk
+      run: cargo install cargo-ndk
+
+    - name: Install cargo-mobile
+      run: cargo install cargo-mobile
+
+    - name: Build for Android
+      run: cargo mobile build --target android
+
+    - name: Run Tests on Android
+      run: cargo mobile test --target android