Previously, when you launched an app from AndroidStudio, you can simulate that Android has killed the app because of low memory doing this:
1. Press home button
2. Terminate the app pressing terminate button in logcat with your process selected
3. Reopen your app pressing in their icon in the emulator
Since Android Studio something has changed because terminate button in logcat is completly closing the app, and not simply killing the process in the same way the OS whould do when is low of memory