JNI: remove custom implementation of util listeners
JNI: remove custom implementation of util listeners

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=751267

GNOME/java-atk-wrapper,thisMagpie/java-atk-wrapper,GNOME/java-atk-wrapper,thisMagpie/java-atk-wrapper,thisMagpie/java-atk-wrapper,GNOME/java-atk-wrapper