Even
the circular icon support was heavily hinted at as the leaked Pixel Launcher indicated support for circular icons, and other Google apps were slowly being updated with circular icon assets embedded in the APK.
Not exact matches
Android 7.1.1 update brings some new things like the following ones: app shortcuts,
circular icons,
support for image keyboard, storage manager intent, improved live wallpaper metadata, and tons of other extra small tweaks.
Yes, the Android Nougat 7.1 will
support circular icons; but no need to worry as it will still
support the current
icon pack for some time now.
Apps can now define
circular launcher
icons, but they can be used only on devices that
support them.
Everyone else can look forward to App Shortcuts,
support for
circular home screen
icons, image keyboards, and more.