i know pandora works on stock touchwiz if you have the widget enabled you will be able to see the skip, pause, like track,this is what i can come up with for you right now but as far as the volume its tough since its a third party app and not actually a Samsung /galaxy app you know ...
sent from one of my GooGle
Vibrant Rocking Paranoid 4.2.2
Samsung t989 SLIMbean 4.2.2 A.O.K.P
Samsung Nexus S 4.2.2 A.O.K.P
Asus Nexus 7 grouper A.O.K.P 4.2.2
MyTouch 4g 4.2.2 CM 10.1
T-mobile Galaxy S4 WICKED V series 4.2.2 - Nova