Listen button fix for older unity versions (ISXB-535)

[ritamerkl]

Description

added conditional compilation for line to avoid older unity versions to throw a warning.

Before review:

• Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
  • For API change contains an example snippet and/or migration example.
  • FogBugz ticket attached, example ([case %number%](https://issuetracker.unity3d.com/issues/...)).
  • FogBugz is marked as "Resolved" with next release version correctly set.
• Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
  • Performance tests.
  • Integration tests.
• Docs for new/changed API's.
  • Xmldoc cross references are set correctly.
  • Added explanation how the API works.
  • Usage code examples added.
  • The manual is updated, if needed.

During merge:

• Commit message for squash-merge is prefixed with one of the list:
  • NEW: ___.
  • FIX: ___.
  • DOCS: ___.
  • CHANGE: ___.
  • RELEASE: 1.1.0-preview.3.

[lyndon-unity]

Seems like a reasonable solution to the issue. Thank you.

[sttz]

The condition only works for the specific patch versions checked (2021.3.28 and 2022.3.1), not for any newer patch versions.

I'm running 2022.3.7 and the listen button is broken again, since the #if does not pass and ToolbarSeachTextField is used again.

The proper fix would to use UNITY_2021_3_OR_NEWER and then exclude all versions without the style name change, for 2022 e.g. !UNITY_2022_1 && !UNITY_2022_2 && !UNITY_2022_3_0. For 2021 this would have to check all 28 previous patch versions, so maybe a dynamic check would be more sensible?