[RN 에러노트] Execution failed for task ':app:installDebug' ...Can't find service: package

에러내용
Execution failed for task ':app:installDebug'.>java.util.concurrent.ExecutionException: com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: Unknown failure: cmd: Can't find service: package

해결법
1) Android Studio를 켜서 AVD Manager로 이동한다.
2) 애뮬레이터를 선택해 Cold Boot Now를 누른다.
3) 애뮬레이터가 모두 켜진후 npm run android

reference : https://velog.io/@ssu00/Execution-failed-for-task-appinstallDebug.-...-Unknown-failure-cmd-Cant-find-service-package