MediaInterface.kt: adjust thumbnail height parameter

Before this commit, the thumbnail height parameter was too small, causing low resolution thumbnails to render.

This commit more than doubles the parameter, increasing the thumbnail resolution.

Author: Jason-Whitmore

app/src/main/java/fr/free/nrw/commons/media/MediaInterface.kt

@@ -190,7 +190,7 @@ interface MediaInterface {
          * Retrieved thumbnail height will be about this tall, but must be at least this height.
          * A larger number means higher thumbnail resolution but more network usage.
          */
-        const val THUMB_HEIGHT_PX = 220
+        const val THUMB_HEIGHT_PX = 450
 
         const val MEDIA_PARAMS =
             "&prop=imageinfo|coordinates&iiprop=url|extmetadata|user&&iiurlheight=" +