8252387: Deprecate for removal css Selector and ShapeConverter constructors

Reviewed-by: nlisker, kcr

Author: bhaweshkc

modules/javafx.graphics/src/main/java/javafx/css/Selector.java

@@ -42,6 +42,13 @@
  */
 abstract public class Selector {
 
+    /**
+     * @deprecated This constructor was exposed erroneously and will be removed in the next version. Use {@link #createSelector(String)} instead.
+     */
+    @Deprecated(since="16", forRemoval=true)
+    public Selector() {
+    }
+
     private static class UniversalSelector {
         private static final Selector INSTANCE =
             new SimpleSelector("*", null, null, null);

modules/javafx.graphics/src/main/java/javafx/css/converter/ShapeConverter.java

@@ -43,6 +43,13 @@ public class ShapeConverter extends StyleConverter<String, Shape> {
 
     public static StyleConverter<String, Shape> getInstance() { return INSTANCE; }
 
+    /**
+     * @deprecated This constructor was exposed erroneously and will be removed in the next version. Use {@link #getInstance()} instead.
+     */
+    @Deprecated(since="16", forRemoval=true)
+    public ShapeConverter() {
+    }
+
     @Override public Shape convert(ParsedValue<String, Shape> value, Font font) {
 
         Shape shape = super.getCachedValue(value);