[Bug] Move a small bug fix to a more appropriate place.

Author: Andy Valdez

WordPress/src/main/java/org/wordpress/android/ui/mediapicker/loader/DeviceListBuilder.kt

@@ -69,7 +69,7 @@ class DeviceListBuilder(
             // This item sets the threshold for the visible items in all the list
             val lastShownTimestamp = results.fold(0L) { timestamp, (_, result) ->
                 val nextTimestamp = result?.nextTimestamp
-                if (result?.items?.isNotEmpty() == true && nextTimestamp != null && nextTimestamp > timestamp) {
+                if (nextTimestamp != null && nextTimestamp > timestamp) {
                     nextTimestamp
                 } else {
                     timestamp
@@ -118,7 +118,7 @@ class DeviceListBuilder(
                 null
             }
         }
-        addPage(mediaType, result, deviceMediaList.next)
+        addPage(mediaType, result, if (result.isEmpty()) null else deviceMediaList.next)
         return cache[mediaType]
     }