Yay! Previously, editing an image on Android would generate a new copy with edits baked in, whereas on iOS & Web edited images were written in place (recording edits as metadata while retaining the original pixels). Per the team post:
Sometimes it takes multiple edits to get a photo just right – or you change your mind and decide the original was perfect just the way it was.
With today’s update for Android, editing is now fully reversible and non-destructive. So you can save your edits or save a new copy of the photo – either way, the original photo will remain untouched.
This update (v1.17) is rolling out now in the Play Store.