fix(FEC-8901): duplication of ClosedCaptions on iOS on none Safari br…

…owser (#221)

Changed the `if` condition of `checkNativeTextTracksSupport` function, to allow other browsers in iOS to set it to `true` by default.

From `isSafari()` -> to `isSafari() || isIos()`

- Tested the matter with iPad in Chrome, Safari, and FireFox.

src/common/utils/setup-helpers.js

@@ -306,7 +306,7 @@ function configureDelayAdsInitialization(options: KPOptionsObject): void {
  * @returns {void}
  */
 function checkNativeTextTracksSupport(options: KPOptionsObject): void {
-  if (isSafari()) {
+  if (isSafari() || isIos()) {
     const useNativeTextTrack = Utils.Object.getPropertyPath(options, 'playback.useNativeTextTrack');
     if (typeof useNativeTextTrack !== 'boolean') {
       Utils.Object.mergeDeep(options, {