Google Photos for Android is getting a new update this week, which makes it easier to edit photos or at least change your mind when making edits.
The basic premise is that the Photos update will let you change your mind at any time when making edits to photos in your collection and revert back to the original photo at any time. You can fully reverse any of your edits as the original photo is saved, or you can save a new copy of the photo with your edits saved.
The update is included in version 1.17 of the Google Photos app for Android, which is startign to roll out through Google Play right now.
Source: +Google Photos.