* Check whether slider is mounted before interaction, no-op if unmounted (#113556)

* Check whether slider is unmounted before interaction

* Update slider.dart

* Update Slider

* Add test

* Update slider_test.dart

* Update packages/flutter/test/material/slider_test.dart
Co-authored-by: Taha Tesser <tessertaha@gmail.com>
Co-authored-by: Taha Tesser <tessertaha@gmail.com>

* exposed tooltip longPress action when available

* updated tooltip test

* updated date picker test

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Co-authored-by: Mingyu <lyming90@gmail.com>
Co-authored-by: Taha Tesser <tessertaha@gmail.com>
Co-authored-by: Harper Liu <harperl0818@gmail.com>