How can I download app in emulator?

I want to launch other app like Netflix in my web app, but I can't find how to download app or app store in emulator or Raspberrypi(with webos).
How can I download apps except my own app?

Then use the command prompt while your AVD is running to enter (in that directory) adb install filename. apk . The app should be added to the app list of your virtual device. The big upside here is that the emulator is unmodified Android right from the source..