functional interface suggester: accept non exact method references

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

@@ -0,0 +1,10 @@
+@FunctionalInterface
+interface I<T> {
+  void foo(T t);
+}
+
+class Foo {
+    void test() {
+      <selection>String::toLowerCase</selection>;
+    }
+}