added flag for useBatchingForLayoutOutputs experiment

Summary:
Using a config flag to switch between different implementations of transferring layout outputs
- YogaNodeJNI uses multiple access of java fields to pass all properties like width, height, margin etc...
- YogaNodeJNIBatching uses a float array to pass all the data in one java field access

Reviewed By: davidaurelio

Differential Revision: D14378301

fbshipit-source-id: 0da5b28e6a67ad8fd60eb7efe622d9b2deaf177f

java/com/facebook/yoga/YogaNodeJNIBase.java

@@ -22,14 +22,14 @@ public abstract class YogaNodeJNIBase extends YogaNode {
   @Nullable private Object mData;
 
   public YogaNodeJNIBase() {
-    mNativePointer = YogaNative.jni_YGNodeNew();
+    mNativePointer = YogaNative.jni_YGNodeNew(YogaConfig.useBatchingForLayoutOutputs);
     if (mNativePointer == 0) {
       throw new IllegalStateException("Failed to allocate native memory");
     }
   }
 
   public YogaNodeJNIBase(YogaConfig config) {
-    mNativePointer = YogaNative.jni_YGNodeNewWithConfig(config.mNativePointer);
+    mNativePointer = YogaNative.jni_YGNodeNewWithConfig(config.mNativePointer, YogaConfig.useBatchingForLayoutOutputs);
     if (mNativePointer == 0) {
       throw new IllegalStateException("Failed to allocate native memory");
     }