<Sound Dev> JDK 9 RFR of 8034046: Fix serial lint warnings in javax.sound

[Joe Darcy]

Hello,

Please review this change to address serial lint warnings in javax.sound:

     8034046: Fix serial lint warnings in javax.sound
     http://cr.openjdk.java.net/~darcy/8034046.0/

Mostly this change is adding six missing serialVersionUID fields; I 
verified the reported serialver values were consistent on JDK 6 and 8.

However, in two classes I also removed some non-javadoc comments.

Thanks,

-Joe