fixing issue 1016

[mhassan772]

This change here is fixing the 1016 issue. https://github.com/ryanheise/audio_service/issues/1016 It is basically solving the problem based on this guidance here: https://developer.apple.com/forums/thread/654413

Pre-launch Checklist

• [X] I read the CONTRIBUTING.md and followed the process outlined there for submitting PRs.
• [X] My change is not breaking and lands in minor branch OR my change is breaking and lands in major branch.
• [X] If I'm the first to contribute to the next version, I incremented the version number in pubspec.yaml according to the pub versioning philosophy.
• [I couldn't find it ] I updated CHANGELOG.md to add a description of the change (format: * DESCRIPTION OF YOUR CHANGE (@mhassan772)).
• [X] I updated/added relevant documentation (doc comments with ///).
• [x] I ran dart analyze.
• [x] I ran dart format.
• [x] I ran flutter test and all tests are passing.

It is a very minor change

[838]

@mhassan772 Thanks for the fix.

@ryanheise We really want to merge this fix to our fork version of audio_service. Could the code has any side effect?

[ryanheise]

I am reviewing this PR now, thanks.

[mhassan772]

How did the review go?

[ryanheise]

My sincere apologies, I recently caught up with my iOS todo list, and this PR is now merged and published. Thank you @mhassan772 for the contribution.