Update CI workflow to use default emulator target and set emulator boot timeout

Author: mohdaquib

.github/workflows/ci.yml

@@ -67,8 +67,9 @@ jobs:
         uses: reactivecircus/android-emulator-runner@v2
         with:
           api-level: 34
-          target: aosp_atd
+          target: default
           arch: x86_64
+          emulator-boot-timeout: 600
           script: ./gradlew :benchmarks:connectedBenchmarkAndroidTest
 
       - name: Parse Benchmark Results