Pull Up/Extract Super: Support members declared in the companion object of the original class

idea/testData/refactoring/pullUp/k2j/fromClassToClass.1.java.after

@@ -3,6 +3,7 @@ import org.jetbrains.annotations.NotNull;
 abstract class A {
 
     public final int x;
+    public static final int _x;
 
     public abstract boolean foo(int n);
 

idea/testData/refactoring/pullUp/k2j/fromClassToClass.kt

@@ -1,5 +1,10 @@
 // WITH_RUNTIME
 abstract class <caret>B: A() {
+    companion object {
+        // INFO: {"checked": "true"}
+        val _x = 1
+    }
+
     // INFO: {"checked": "true"}
     val x = 1
     // INFO: {"checked": "true"}

idea/testData/refactoring/pullUp/k2j/fromClassToClass.kt.after

@@ -1,5 +1,6 @@
 // WITH_RUNTIME
 abstract class B: A() {
+
     // INFO: {"checked": "true"}
     val y: Int get() = 2
     // INFO: {"checked": "true"}