You can pause a subscription that was purchased only through the Android app. It will be paused once the current billing cycle ends. You will be able to re-activate it at any time or cancel the pause before it comes into effect. The subscription will be re-activated in accordance with the chosen period of time. If you purchase a new subscription when already having a paused subscription, the previous subscription will be cancelled.
The subscriptions can be paused and restarted only in the Google Play app, more details can be found in Google Play Help.