[android] Fix Use element spec conformance (x and y interpretation)

android/src/main/java/com/horcrux/svg/RenderableViewManager.java

@@ -644,6 +644,16 @@ class RenderableViewManager extends ViewGroupManager<VirtualView> {
             node.setHref(href);
         }
 
+        @ReactProp(name = "x")
+        public void setX(UseView node, Dynamic x) {
+            node.setX(x);
+        }
+
+        @ReactProp(name = "y")
+        public void setY(UseView node, Dynamic y) {
+            node.setY(y);
+        }
+
         @ReactProp(name = "width")
         public void setWidth(UseView node, Dynamic width) {
             node.setWidth(width);

android/src/main/java/com/horcrux/svg/UseView.java

@@ -23,6 +23,8 @@ import com.facebook.react.uimanager.annotations.ReactProp;
 @SuppressLint("ViewConstructor")
 class UseView extends RenderableView {
     private String mHref;
+    private SVGLength mX;
+    private SVGLength mY;
     private SVGLength mW;
     private SVGLength mH;
 
@@ -36,6 +38,18 @@ class UseView extends RenderableView {
         invalidate();
     }
 
+    @ReactProp(name = "x")
+    public void setX(Dynamic x) {
+        mX = getLengthFromDynamic(x);
+        invalidate();
+    }
+
+    @ReactProp(name = "y")
+    public void setY(Dynamic y) {
+        mY = getLengthFromDynamic(y);
+        invalidate();
+    }
+
     @ReactProp(name = "width")
     public void setWidth(Dynamic width) {
         mW = getLengthFromDynamic(width);
@@ -53,6 +67,7 @@ class UseView extends RenderableView {
         VirtualView template = getSvgView().getDefinedTemplate(mHref);
 
         if (template != null) {
+            canvas.translate((float) relativeOnWidth(mX), (float) relativeOnHeight(mY));
             if (template instanceof RenderableView) {
                 ((RenderableView)template).mergeProperties(this);
             }