PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
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• All existing tests are passing: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/DevelopmentWorkflow.md#running-unit-tests-application.
• Tests for the changes are included - https://github.com/NativeScript/NativeScript/blob/master/tools/notes/WritingUnitTests.md.

What is the current behavior?

On iOS, there are times ListView skips needed measure updates. That is because method measure is overridden and performs a check that causes defects.
See: https://github.com/NativeScript/NativeScript/blob/main/packages/core/ui/list-view/index.ios.ts#L396

Calling _setCurrentMeasureSpecs may indicate whether size changed but also updates previous measure spec values, resulting in skipping measure update in the super.measure() call.

What is the new behavior?

iOS ListView will undergo measurements as expected.