Add a copy constructor for the layout parameters

Author: abarisain

flexbox/src/main/java/com/google/android/flexbox/FlexboxLayout.java

@@ -2024,6 +2024,16 @@ public LayoutParams(Context context, AttributeSet attrs) {
             a.recycle();
         }
 
+        public LayoutParams(LayoutParams source) {
+            super(source);
+
+            order = source.order;
+            flexGrow = source.flexGrow;
+            flexShrink = source.flexShrink;
+            alignSelf = source.alignSelf;
+            flexBasisPercent = source.flexBasisPercent;
+        }
+
         public LayoutParams(ViewGroup.LayoutParams source) {
             super(source);
         }