change return type fix: ensure parameter types are untouched (IDEA-138748)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/methodReturn/afterUntouchMethodParams.java

@@ -0,0 +1,11 @@
+// "Make 'f' return 'int'" "true"
+interface SomeInterface<T> {
+    int f(T t);
+}
+
+class B implements SomeInterface<String> {
+    @Override
+    public int f(String s) {
+        return 1;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/methodReturn/beforeUntouchMethodParams.java

@@ -0,0 +1,11 @@
+// "Make 'f' return 'int'" "true"
+interface SomeInterface<T> {
+    void f(T t);
+}
+
+class B implements SomeInterface<String> {
+    @Override
+    public void f(String s) {
+        return <caret>1;
+    }
+}