fix(UI): Fix get thumbnails while casting (#8509)

Author: avelad

lib/cast/cast_utils.js

@@ -317,8 +317,6 @@ shaka.cast.CastUtils.PlayerGetterMethods = new Map()
     .set('getPlaybackRate', 2)
     .set('getTextLanguages', 4)
     .set('getTextLanguagesAndRoles', 4)
-    .set('getImageTracks', 2)
-    .set('getThumbnails', 2)
     .set('isAudioOnly', 10)
     .set('isBuffering', 1)
     .set('isInProgress', 1)
@@ -345,8 +343,10 @@ shaka.cast.CastUtils.LargePlayerGetterMethods = new Map()
     .set('getConfigurationForLowLatency', 4)
     .set('getStats', 5)
     .set('getAudioTracks', 2)
+    .set('getImageTracks', 2)
     .set('getVideoTracks', 2)
     .set('getTextTracks', 2)
+    .set('getThumbnails', 2)
     .set('getVariantTracks', 2);