Google Maps has been updated with improved support for the iPhone Duo’s displays, so that the app now fills the foldable iPhone’s inner and outer screens rather than leaving unused space along the edge. The change comes with version 26. 44. 4, which is available on the App Store . Google doesn’t mention Duo-specific changes in its release notes, but the updated support is plainly visible. The previous version, 26. 43. 1, was only partially adapted to the device, and there was still a vertical black border along the right side of both the inner and outer screens, where the circular status bar lives…