It's an insoluble problem, which is why both Google and Microsoft are making attempts to bolt Apple's business model on the side of their own, becoming device manufacturers in competition with their own hardware partners.
The problem is that the device manufacturer doesn't have the customer; the platform and/or the carrier does. Next time around, any loyalty a customer has, will be to Android, not to Samsung, HTC, Panasonic, Sony, Motorola, LG, Kyocera, Panasonic or Huawei. There is simply no motivation for manufacturers to spend good money enhancing an already sold device with the latest Android release.
It's the same problem for Android OEMs that plagued the Wintel PC makers - inability to innovate or even change, because change takes effort, and the effort costs, while benefitting competitors equally.
Apple's business model lets them keep devices up to date, and reap the benefit of a strong customer relationship, which includes an ability to impose change. The rest of the industry has always depended on Apple not for innovation itself, but to give innovations critical mass in the market. That includes the 3.5 inch floppy, SCSI, WiFi, HTML5, the mouse/windows UI, USB, the touchscreen UI, Postscript, the tablet computer, and doubtless others.