java completion: don't suggest inacessible method/constructor references (IDEA-182311)

java/java-tests/testData/codeInsight/completion/smartType/NoInaccessibleConstructorRef.java

@@ -0,0 +1,12 @@
+import java.util.function.Supplier;
+
+class RefMain1 {
+  {
+    Supplier<Foo> s = <caret>
+  }
+}
+
+class Foo {
+  private Foo() {
+  }
+}