Google may not have a Jony Ive, but there is nevertheless a coherent process for laying out a design vision across all these multiple teams and platforms.
Theverge.com (recoommeded read and video)

Yes Mr Ive is a master mind in design, but he is only one person writing a master code for design. If Google see that design is only a code, then they could use there speed to over take the design position that Apple dominates.

Thanks to Ulf A. Carlson.