8244818: Java2D Queue Flusher crash while moving application window to external monitor Reviewed-by: serb, jdv, kcr (cherry picked from https://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/5414b80b28cb) Bug: 171039472 Change-Id: I464ca7a13b186e26442d21c95b68f1e767aa9d9e