CI: Enable KVM and caching of AVD

.github/workflows/main.yml

@@ -291,6 +291,28 @@ jobs:
       id: setup-ndk
       with:
         ndk-version: r26d
+    - name: Enable KVM
+      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
+    - name: AVD cache
+      uses: actions/cache@v4
+      id: avd-cache
+      with:
+        path: |
+          ~/.android/avd/*
+          ~/.android/adb*
+        key: avd-${{ matrix.api-level }}
+    - name: Create AVD and Snapshot for Caching
+      if: steps.avd-cache.outputs.cache-hit != 'true'
+      uses: reactivecircus/android-emulator-runner@v2
+      with:
+        api-level: ${{ matrix.api-level }}
+        force-avd-creation: false
+        emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+        disable-animations: false
+        script: echo "Generated AVD snapshot for caching."
     - name: Configure CMake
       env: 
         ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
@@ -335,7 +357,6 @@ jobs:
       with:
         api-level: ${{ matrix.api-level }}
         target: default
-        arch: x86_64 # Fixed for now
         script: |
           ${{github.workspace}}/.github/scripts/android_test_main.sh ${{github.workspace}}/build ${ANDROID_NDK_HOME}/toolchains/llvm/prebuilt/linux-x86_64/sysroot ${{ matrix.arch.triple }}