So the goal was to be able to start the application from adb as if you were physically pushing the icon on your home screen. To do this I looked at the logcat data and found out that the first activity that was being launched was ScriptManager so therefore to start the application, I needed:
adb shell am start -n com.googlecode.android_scripting/.activity.ScriptManager
or in a generic case:
adb shell am start -n <package>/<activity>