When a RemoteControlClient reports an error for its playstate, make the play/pause button display the warning platform icon. Note that a specific image description is not available for this state at this time, but the one being used (the same as for the play icon) is valid as it correctly describes the action the button performs. Change-Id: I59aadab3fe5bcc09a2f7be0b9e4cffb0c500e865