Setting up multiple android platforms

I would like to have an Android version that has Crosswalk for the older droid devices and I would like to have one without so the APK size is 20mb smaller, for the newer devices.

I assume there is no way to add multiple Android platforms in an Ionic setup but would love to hear otherwise.
That said - is there a better approach than having duplicate versions of my Ionic app to achieve this?
I would rather not have to uninstall/reinstall Crosswalk and change my targetSdkVersion everytime I want to publish a new APK either.

Is there a way to temporarily disable/not include Crosswalk while building?

Recommendations for development setup for this?