Here's a definition of dumping: http://www.glin.gov/subjectTermIndex.action?searchDetails.qu...
Dumping only really has any meaning in international trade, and it refers to predatory pricing policy -- such as when Japanese steel companies were accused of dumping steel on the US market in order to kill their US competition a few years ago. To any reasonable person, there is a clear difference between steel and a mobile operating system. But, supposing this were in scope, if Google makes a profit from mobile advertising or takes a small cut of sales of Android phones by bundling Google apps, Android is still not going for less than market value in any kind of predatory manner.
If Android is being "dumped" to get an advantage in the advertising market, you would have to take the argument further on to other absurd conclusions. Should free newspapers be prevented from "dumping" in racks nearby paid-subscription newspapers? For that matter, is Craigslist dumping classified ads? Should Apple accuse Google for dumping email service in order to help corner the advertising market, since gmail is free and mac.com email is not? The absurdity continues.