Allow specific border width styling

Summary:
ahmedre, is this in accordance to what you mentioned in comment https://github.com/facebook/react-native/issues/11042#issuecomment-269892926 ?

fixes #11042

NO TEST PLAN AS OF YET! NOT READY.

I am going to attempt to show this in my current application today.
Closes https://github.com/facebook/react-native/pull/11706

Differential Revision: D4494439

Pulled By: mkonicek

fbshipit-source-id: 2e1ee4c4a8347ddb29ee28bafe5ca5f7b6c04317

ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundDrawable.java

@@ -102,7 +102,7 @@ public class ReactViewBackgroundDrawable extends Drawable {
     boolean roundedBorders = mBorderCornerRadii != null ||
         (!YogaConstants.isUndefined(mBorderRadius) && mBorderRadius > 0);
 
-    if ((mBorderStyle == null || mBorderStyle == BorderStyle.SOLID) && !roundedBorders) {
+    if (!roundedBorders) {
       drawRectangularBackgroundWithBorders(canvas);
     } else {
       drawRoundedBackgroundWithBorders(canvas);