<Sound Dev> [9] Review Request: 8163949 Cleanup of classes which are related to JavaSound

[Sergey Bylokhov]

Hello, Audio Guru.

Please review cleanup of JavaSound classes in jdk9, which is result of 
my ongoing cleanup of JavaSound API.
  - @Override was applied to lots of methods.
  - Useless comments like /**Old code*/ were removed.
  - The final keyword was added to some fields.
  - The empty lines usage was unified.
  - The usage of "import" was unified/cleaned as well
  - Unnecessary casts were removed.
  - The diamond operator now used insteaf types for example:(new 
HashMap<String, Object> was changed to new HashMap<>, etc)

Since webrev became huge I postpone other possible cleanups.

No regressions were found by jtreg/jck tests.

Bug: https://bugs.openjdk.java.net/browse/JDK-8163949
Webrev can be found at: http://cr.openjdk.java.net/~serb/8163949/webrev.01

-- 
Best regards, Sergey.