I don't think there is, not in the same way you might find them for iPhones. Because Android phones don't have dock connectors, usually they have a micro-USB in the top or side.
Where I am, I just don't see many iPhone dock speakers systems at all. Most devices here have USB sockets, so you can plug your phone or USB thumb-drive in.
The People's Guide
to Android in the People's Republic.
Honorary Grand Poobah Shenzhen University English Corner.
There are nine million bicycles in Beijing.
There are nine million Androids in Shenzhen.