do not replace type with immediate type without necessity (IDEA-56926)

java/java-tests/testData/refactoring/introduceVariable/SiblingInnerClassType.after.java

@@ -0,0 +1,10 @@
+class A {
+  class B {
+  }
+
+  class C {
+     void testHere() {
+         B vari = new B();
+     }
+  }
+}

java/java-tests/testData/refactoring/introduceVariable/SiblingInnerClassType.java

@@ -0,0 +1,10 @@
+class A {
+  class B {
+  }
+
+  class C {
+     void testHere() {
+       new <caret>B()
+     }
+  }
+}