don't suggest inaccessible functional interfaces (IDEA-174008)

java/java-tests/testData/refactoring/introduceFunctionalVariable/beforeNoSuggestionForInaccessibleInterface.java

@@ -0,0 +1,17 @@
+class A {
+ void assignment(double v, int x, int y) {
+        String result;
+<selection>
+        result = format("digit %f", v, x, y );
+</selection>
+        System.out.println(result);
+    }
+
+}
+
+class B {
+    @FunctionalInterface
+    private interface DII {
+        String doIt(double d, int x, int y);
+    }
+}