RFR: 8044862: Fix raw and unchecked lint warnings in macosx specific code

Hi, Please review a webrev for fixing rawtypes and unchecked lint warning for macosx specific java code, this webrev is depending on JDK-8043548[1] where some of the override methods are defined, Also as the src/macosx/classes/apple/launcher/JavaAppLauncher.java to be removed from JDK-8048337, the webrev omits that file. The webrev can be found at, http://cr.openjdk.java.net/~henryjen/jdk9/8044862/0/webrev/ [1] https://bugs.openjdk.java.net/browse/JDK-8043548 Cheers, Henry