Initial support of annotation loading at runtime

In order to locate an annotated entity, we need to implement almost the whole
Java element model (which will be used anyway for Java descriptor loading)

compiler/testData/loadJava/compiledJava/static/StaticFinal.txt

@@ -4,5 +4,10 @@ public open class StaticFinal {
     public constructor StaticFinal()
 
     // Static members
-    public final val foo: kotlin.String = "aaa"
+    public/*package*/ final val packageNonNull: kotlin.String = "bbb"
+    public/*package*/ final val packageNull: kotlin.String!
+    private final val privateNonNull: kotlin.String = "bbb"
+    private final val privateNull: kotlin.String!
+    public final val publicNonNull: kotlin.String = "aaa"
+    public final val publicNull: kotlin.String!
 }