Make room for laziness in the Annotations interface

compiler/backend/src/org/jetbrains/jet/codegen/PropertyCodegen.java

@@ -149,7 +149,7 @@ public class PropertyCodegen extends GenerationStateAware {
     // Annotations on properties without backing fields are stored in bytecode on an empty synthetic method. This way they're still
     // accessible via reflection, and 'deprecated' and 'private' flags prevent this method from being called accidentally
     private void generateSyntheticMethodIfNeeded(@NotNull PropertyDescriptor descriptor) {
-        if (descriptor.getAnnotations().getAnnotationDescriptors().isEmpty()) return;
+        if (descriptor.getAnnotations().isEmpty()) return;
 
         ReceiverParameterDescriptor receiver = descriptor.getReceiverParameter();
         Type receiverAsmType = receiver == null ? null : typeMapper.mapType(receiver.getType());

compiler/frontend/serialization/src/org/jetbrains/jet/descriptors/serialization/DescriptorSerializer.java

@@ -431,7 +431,7 @@ public class DescriptorSerializer {
     }
 
     private static boolean hasAnnotations(Annotated descriptor) {
-        return !descriptor.getAnnotations().getAnnotationDescriptors().isEmpty();
+        return !descriptor.getAnnotations().isEmpty();
     }
 
     @NotNull

compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationResolver.java

@@ -155,7 +155,7 @@ public class DeclarationResolver {
             if (modifierList != null) {
                 MutableClassDescriptor descriptor = entry.getValue();
                 descriptor.addAnnotations(annotationResolver.resolveAnnotationsWithoutArguments(
-                        descriptor.getScopeForSupertypeResolution(), modifierList, trace).getAnnotationDescriptors());
+                        descriptor.getScopeForSupertypeResolution(), modifierList, trace));
             }
         }
     }