Update the media router dialogs and integrate into system UI.

Port the new style UI back into the framework from the support library.
There are now two dialogs: a chooser and a controller.  We use the
same dialogs for selecting routes within app and within quick settings.

Note that the new UI does not support any grouping features since they
are deprecated and unused.

Bug: 11257292
Change-Id: I64e936a18d25ab75f0c470cbc1e7085f67004863