Fix media router dependencies for AndroidStudio

MediaRouters API specific implementations were depending on
AppCompat which would require them to be compiled with
current SDK. This CL moves those dependencies to the
final compilation of media router. This is not a great
solution but works for now and fixes the AS integration
with support library

Change-Id: I3efaf5df967e5b242f245770eb36e8df118d970a
3 files changed