Fixup bad ANDROIDLINT Automatic Fix (facebook#42694)

Summary:
Pull Request resolved: facebook#42694

D53115471 commited all the automatically fixable lints by `ANDROIDLINT`. When I looked again, closer, there was one automatic fix that I'm fairly sure is incorrect.

Before:

`outTransform.postTranslate((int) (dx + 0.5f), (int) (dy + 0.5f));`

After:

`outTransform.postTranslate((dx + 0.5f), (dy + 0.5f));`

I think the linter did this because the underlying API accepts a float, so this was (incorrectly) seen as an extraneous cast causing precision loss, but the previous behavior was using the cast and addition to round the float, instead of adding 0.5 to it.

This replaces the call with an explicit rounding, for the same behavior as before (though, I'm not sure if the rounding is intentional, since in and out are both fp).

Changelog: [Internal]

Reviewed By: joevilches

Differential Revision: D53158801

fbshipit-source-id: d268a5c429663dd7da0bfce2d717589986601196

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/image/ScaleTypeStartInside.java

@@ -28,7 +28,7 @@ public void getTransformImpl(
     float dx = parentRect.left;
     float dy = parentRect.top;
     outTransform.setScale(scale, scale);
-    outTransform.postTranslate((dx + 0.5f), (dy + 0.5f));
+    outTransform.postTranslate(Math.round(dx), Math.round(dy));
   }
 
   @Override