I think fragmentation is a misnomer. Most versions of Android are similar, and in fact have to comply to a set of standards in order to run Google’s proprietary apps. You can’t deviate too far from the standard or you won’t be compatible, which is why the Kindle devices technically run Android but don’t have the Play Store etc.
Google’s software strategy is horizontal, Apple’s is vertical. Although you’ll get a better experience on Android and a tighter integration, ultimately if you’re using Google services on iOS like Google Search, Google Maps, YouTube, Gmail (which most people are) - you’re still using Google’s services.
If you want a closer hardware/software integration that’s closer to a vertical style strategy like Apple, and you want direct updates from Google, etc… That’s why the Pixel range exists.
Android tablets were doing well a few years ago but they switched their strategy away from them towards larger devices and Chrome OS tablets. Google obviously feels that Chrome OS is a better strategy there so that’s really a moot point.
In cars, Android Auto is generating more customer interested compared to Apple’s offering. I don’t drive so I don’t know much about it, but 30% of people in a poll considered Android Auto to be a must have compared to 23% for CarPlay. I guess neither of them are hugely commonplace right now but probably will be in a few years.
Google also appear to have a lead on Apple in the TV space, but both have lower market share than Amazon or Roku (but since the Amazon devices run on an OS based on Android, if you include that in the data then Google also win here).