Hi @Bal_Mukund,
You can definitely run tests on an emulator instead of a real device, but you’ll need to start the emulator first. You can start an installed emulator from the command line using some commands here: https://developer.android.com/studio/run/emulator-commandline
Hardcoding the path to the APK seems OK to me if it’s not going to change. You can use a relative path in the startApplcation command so it’s not so brittle. I think you could also pass the location of the APK file on the command line, but it’s a bit tricky. Here’s a thread about it: How to pass user defined parameters from command line
As for installing Katalon Studio automatically, you might have luck with running Katalon Studio in a Docker container, as mentioned here: https://docs.katalon.com/katalon-studio/videos/katalon_run_docker_container.html
There’s also a Katalon Jenkins plugin which could take care of that for you: https://wiki.jenkins.io/display/JENKINS/Katalon+Plugin
Hope this helps,
Chris