Trying AVD cache to speed up CI

https://github.com/ReactiveCircus/android-emulator-runner#usage--examples

Author: federicoiosue

.github/workflows/main.yml

@@ -15,12 +15,30 @@ jobs:
           distribution: 'temurin'
           java-version: 11
           cache: 'gradle'
+      - name: AVD cache
+        uses: actions/cache@v3
+        id: avd-cache
+        with:
+          path: |
+            ~/.android/avd/*
+            ~/.android/adb*
+          key: avd-30
+      - 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: 30
+          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: Run unit/instrumentation tests and coverage generation
         uses: reactivecircus/android-emulator-runner@v2
         with:
           api-level: 30
           target: google_apis
           arch: x86_64
+          force-avd-creation: false
           emulator-options: -no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim
           disable-animations: true
           script: ./gradlew -Pandroid.testInstrumentationRunnerArguments.notAnnotation=androidx.test.filters.FlakyTest,androidx.test.filters.LargeTest jacocoTestReport --stacktrace