The method to dispatch actions in MediaControllerImplBase takes
a Player.Command, but the value is only used to check if we
are setting a surface and need to handle the special blocking
call. This can be cleaned up by removing the parameter and calling
a dedicated blocking method where needed. This also ensures we
have to mention the relevant Player.Command only once in each
method.
PiperOrigin-RevId: 502341862
(cherry picked from commit 664ab72d)
