Fix synthetic accessor generation for properties

Generate synthetic accessors for property accessors only if the
corresponding methods are accessible in the current context.

 #KT-19306 Fixed Target versions 1.1.5

compiler/testData/writeFlags/property/accessors/accessorForProtectedPropertyWithPrivateSetter.kt

@@ -0,0 +1,24 @@
+// FILE: A.kt
+package a
+
+abstract class A {
+    protected var property: String = ""
+        private set
+}
+
+// FILE: B.kt
+package b
+
+import a.A
+
+class B : A() {
+    init {
+        invoke { property }
+    }
+
+    fun invoke(func: () -> String): String = func()
+}
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: b/B, access$setProperty$p
+// ABSENT: true