push down: static import preserve (IDEADEV-33557)

java/java-tests/testData/refactoring/pushDown/staticImportOfPushedMethod/after/a/A.java

@@ -0,0 +1,3 @@
+package a;
+public class A {
+}

java/java-tests/testData/refactoring/pushDown/staticImportOfPushedMethod/after/b/B.java

@@ -0,0 +1,7 @@
+package b;
+import a.*;
+
+public class B extends A {
+    public static void foo(){
+    }
+}

java/java-tests/testData/refactoring/pushDown/staticImportOfPushedMethod/after/u/U.java

@@ -0,0 +1,7 @@
+package u;
+import static b.B.foo;
+public class U {
+  public static void main(String[] args) {
+    foo();
+  }
+}