Pass FlatViewGroup to DrawCommand.draw()

Summary: @public To render `View`s inside `FlatViewGroup`, we need to pass the parent to `DrawCommand.draw()` method. Used in a followup diff.

Reviewed By: sriramramani

Differential Revision: D2564478

ReactAndroid/src/main/java/com/facebook/react/flat/DrawBackgroundColor.java

@@ -26,7 +26,7 @@ import android.graphics.Paint;
   }
 
   @Override
-  public void draw(Canvas canvas) {
+  public void draw(FlatViewGroup parent, Canvas canvas) {
     PAINT.setColor(mBackgroundColor);
     canvas.drawRect(getLeft(), getTop(), getRight(), getBottom(), PAINT);
   }

ReactAndroid/src/main/java/com/facebook/react/flat/DrawBorder.java

@@ -169,7 +169,7 @@ import com.facebook.csslayout.Spacing;
   }
 
   @Override
-  public void draw(Canvas canvas) {
+  public void draw(FlatViewGroup parent, Canvas canvas) {
     if (getBorderRadius() >= 0.5f) {
       drawRoundedBorders(canvas);
     } else {

ReactAndroid/src/main/java/com/facebook/react/flat/DrawCommand.java

@@ -25,5 +25,5 @@ public interface DrawCommand {
    *
    * @param canvas The canvas to draw into
    */
-  public void draw(Canvas canvas);
+  public void draw(FlatViewGroup parent, Canvas canvas);
 }

ReactAndroid/src/main/java/com/facebook/react/flat/DrawImageWithPipeline.java

@@ -80,7 +80,7 @@ import com.facebook.react.views.image.ImageResizeMode;
   }
 
   @Override
-  public void draw(Canvas canvas) {
+  public void draw(FlatViewGroup parent, Canvas canvas) {
     Bitmap bitmap = Assertions.assumeNotNull(mBitmapRequestHelper).getBitmap();
     if (bitmap == null) {
       return;

ReactAndroid/src/main/java/com/facebook/react/flat/DrawTextLayout.java

@@ -31,7 +31,7 @@ import android.text.Layout;
   }
 
   @Override
-  public void draw(Canvas canvas) {
+  public void draw(FlatViewGroup parent, Canvas canvas) {
     float left = getLeft();
     float top = getTop();
 

ReactAndroid/src/main/java/com/facebook/react/flat/FlatViewGroup.java

@@ -56,7 +56,7 @@ import android.view.ViewGroup;
     super.dispatchDraw(canvas);
 
     for (DrawCommand drawCommand : mDrawCommands) {
-      drawCommand.draw(canvas);
+      drawCommand.draw(this, canvas);
     }
   }