Rubicon able to read mediaTypes.size (prebid#2607)

* Rubicon able to read mediaTypes.size

checkBidRequestSizes is normally present in adaptermanager.js to add the mediaTypes.banner.sizes to bid.sizes. However our adapter need to be able to read these fields in case the method is deprecated.
Same for the Video.

modules/rubiconBidAdapter.js

@@ -506,7 +506,9 @@ function parseSizes(bid) {
   let params = bid.params;
   if (spec.hasVideoMediaType(bid)) {
     let size = [];
-    if (params.video && params.video.playerWidth && params.video.playerHeight) {
+    if (typeof utils.deepAccess(bid, 'mediaTypes.video.playerSize') !== 'undefined') {
+      size = bid.mediaTypes.video.playerSize;
+    } else if (params.video && params.video.playerWidth && params.video.playerHeight) {
       size = [
         params.video.playerWidth,
         params.video.playerHeight
@@ -518,7 +520,16 @@ function parseSizes(bid) {
   }
 
   // deprecated: temp legacy support
-  let sizes = Array.isArray(params.sizes) ? params.sizes : mapSizes(bid.sizes)
+  let sizes = [];
+  if (Array.isArray(params.sizes)) {
+    sizes = params.sizes;
+  } else if (typeof utils.deepAccess(bid, 'mediaTypes.banner.sizes') !== 'undefined') {
+    sizes = mapSizes(bid.mediaTypes.banner.sizes);
+  } else if (Array.isArray(bid.sizes) && bid.sizes.length > 0) {
+    sizes = mapSizes(bid.sizes)
+  } else {
+    utils.logWarn('Warning: no sizes are setup or found');
+  }
 
   return masSizeOrdering(sizes);
 }