It all goes back to money as Google aims to maintain the lions share of advertising revenue.
From the one of the links i posted:
The real question is whether Brussels forces the company to open up its Android ecosystem — a mobile empire that now encompasses more than 2 billion smartphones worldwide and that has given Google prime online real estate in the battle for the future of the internet.
"Through Android, Google has put its services like YouTube, Google Maps and the company’s app store in the hands of billions."
That could hit at the search giant’s core advertising business — worth billions of dollars each year — by weakening its hold over the search queries and other digital habits that people regularly type into their smartphones. It may also hamstring Google’s efforts to remain at the core of the ever-expanding mobile web, reducing its market share as people shift from desktops to mobile devices.