emulator: 4 cores instead of 2

Change-Id: I8533924ed1bcbc3b6b6fd898994176c537500fb5

Author: JoseAlcerreca

.github/workflows/build_and_test.yml

@@ -128,6 +128,7 @@ jobs:
           api-level: ${{ matrix.api-level }}
           arch: x86_64
           disable-animations: true
+          cores: 4
           disk-size: 6000M
           heap-size: 600M
           script: ./gradlew connectedDebugAndroidTest --daemon