1. You can continue writing Android apps. You can (very likely) start distributing apps through the Play Store again just by creating a new account with a new credit card. Create an account as a company instead of an individual, for example.
2. Unless you're very old, distributing apps through the Play Store isn't something you'll be doing "for the rest of your life" regardless. Technologies come and go. Native apps will be replaced by web apps on mobile, just like they were on desktop.
3. You don't need to have apps in the Play Store to have apps in your portfolio.