Support visibility for protected static members

#KT-2999 Fixed

compiler/testData/codegen/visibility/withJava/protected_static/protectedStaticFunClassObject.kt

@@ -0,0 +1,11 @@
+class A {
+  class object: protectedStaticFunClassObject() {
+    fun test(): String {
+      return protectedStaticFunClassObject.protectedFun()!!
+    }
+  }
+}
+
+fun box(): String {
+  return A.test()
+}