ChangeType adds unnecessary import on fully qualified parameterized type.

    @Test
    void test() {
        rewriteRun(
          java(
            """
            package a;
            public class A1<T> {
            }
            """
          ),
          java(
            """
              public class B {
                  public void method(a.A1<String> a) {
                  }
              }
              """,
            """
              public class B {
                  public void method(a.A2<String> a) {
                  }
              }
              """
          )
        );
    }

Start by reproducing the supplied rewriteRun test for ChangeType with a fully qualified parameterized type. Trace how the transformation handles the type reference and imports. Done means changing a.A1 to a.A2 without adding an unnecessary import.