Generate field for const-val with same visibility as desciptor

Also add test checking that constant static final fields generated for them

compiler/testData/compileJavaAgainstKotlin/property/ConstVal.kt

@@ -0,0 +1,16 @@
+@file:JvmName("ABC")
+package test;
+
+public const val TOP_LEVEL = "O"
+
+public object A {
+    public const val OBJECT = "K"
+}
+
+public class B {
+    companion object {
+        public const val COMPANION = "56"
+    }
+}
+
+annotation class Ann(val value: String)