Request for review, JDK-8048022 Fix raw and unchecked warnings in javax.accessibility

[Pete Brunet]

Hi Swing team,

Please review a change to javax.accessibility to fix the rawtype and
unchecked lint warnings for that package.

Bug:  https://bugs.openjdk.java.net/browse/JDK-8048022
Webrev:  http://cr.openjdk.java.net/~ptbrunet/JDK-8048022/webrev.00/

Best regards,
Pete