Refactor YogaNode.Inputs freeze API

Summary:
`InternalNode` will eventually not have a pointer to its parent. This diff removes one of the usages of the `InternalNode#getParent()` API. `InternalNode` will also not host the `YogaNode` eventually; so this diff also removes one of the usages of the `InternalNode#getYogaNode()` api.

Now the `Inputs#freeze` api will pass the parent's `YogaNode` and the `YogaNode` of the node (this) being measured.

Changelog: [Internal] Passes The YogaNode and parent YogaNode in the Inputs.freeze API

Reviewed By: SidharthGuglani

Differential Revision: D27240229

fbshipit-source-id: efc4ec3249a963c3181111f9b989d8ed9e17feb4

java/com/facebook/yoga/YogaNode.java

@@ -15,7 +15,7 @@ public abstract class YogaNode implements YogaProps {
   public interface Inputs {
 
     /** Requests the data object to disable mutations of its inputs. */
-    void freeze();
+    void freeze(final YogaNode node, final @Nullable YogaNode parent);
   }
 
   public abstract void reset();