Hopefully everyone who participated in this:
https://www.ozbargain.com.au/node/314390
Has either spent their vouchers (or sold them), or has taken screenshots of them.
If not, don't upgrade to Google Pay until you've done so, or you'll lose the vouchers!
If you still have Android Pay installed, open each of your vouchers, and hold the volume-down button and power-button to take a screenshot.
Be sure to include the barcode and the PIN where applicable.
I would have lost 22 Village Cinema vouchers if I hadn't taken screen shots.
Too late…