Resolve issue where 'subtitleOn' doesn't enable subtitles by default on iOS

[alideep5]

This pull request includes a small change to the lib/src/cupertino/cupertino_controls.dart file. It updates the _initialize method to correctly assign the _subtitleOn flag based on chewieController.showSubtitles and whether the subtitle is not empty.

Previously, the code was:

chewieController.showSubtitles &&
    (chewieController.subtitle?.isNotEmpty ?? false);

This line had no effects and was effectively dead code. The condition was evaluated but not used.

The updated version assigns the result of the condition to _subtitleOn:

_subtitleOn = chewieController.showSubtitles &&
    (chewieController.subtitle?.isNotEmpty ?? false);

This change ensures that subtitles are properly enabled by default when the showSubtitles flag is true and a non-empty subtitle is present.

File Changes

• [lib/src/cupertino/cupertino_controls.dart](https://www.notion.so/1cfd8b130ac680f381d4c435719819ff?pvs=21): Updated _initialize method to assign _subtitleOn.

[louisdeveseleer]

That should fix #914

[diegotori]

LGTM.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.55%. Comparing base (b0ccd83) to head (fbb60cb).
Report is 17 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #917      +/-   ##
==========================================
- Coverage   44.95%   44.55%   -0.41%     
==========================================
  Files          22       22              
  Lines        1546     1560      +14     
==========================================
  Hits          695      695              
- Misses        851      865      +14     

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