<AWT Dev> [9] Review Request: 8031090 [macosx] LWToolkit should not depends from the macosx

[Sergey Bylokhov]

Hello.
Please review the fix for jdk 9.
  - Dependency in LWtoolkit from sun.lwawt.macosx.* was moved to LWCToolkit.
  - All unimplemented stubs in LWToolkit were removed.
  - @override and final were added where appropriate.
  - long lines were split.

Bug: https://bugs.openjdk.java.net/browse/JDK-8031090
Webrev can be found at: http://cr.openjdk.java.net/~serb/8031090/webrev.00

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Best regards, Sergey.