Externally loaded text tracks not loading properly (#3461)

* fix text tracks

* keep map

* use where

* update change log

* fix build error

ios/Video/Features/RCTPlayerOperations.swift

@@ -18,7 +18,7 @@ enum RCTPlayerOperations {
 
             // The first few tracks will be audio & video track
             var firstTextIndex = 0
-            for i in 0 ..< trackCount where (player?.currentItem?.tracks[i].assetTrack?.hasMediaCharacteristic(.legible)) != nil {
+            for i in 0 ..< trackCount where player?.currentItem?.tracks[i].assetTrack?.hasMediaCharacteristic(.legible) ?? false {
                 firstTextIndex = i
                 break
             }