bug(mat-slider): dragEnd event no longer triggers for matSliderStartThumb and matSliderEndThumb

[ChristopherSnay]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

15.0.1

Description

The events no longer fire without any code change since 15.0.1.

<mat-slider>
    <input matSliderStartThumb (dragEnd)="dragEnded($event)">
    <input matSliderEndThumb (dragEnd)="dragEnded($event)">
</mat-slider>

Reproduction

Steps to reproduce:

1. Add a new mat-slider with start and stop thumbs.
2. Add a dragEnd event to each input
3. Event is not triggered.

Expected Behavior

The event should fire on dragEnd

Actual Behavior

The event does not fire on dragEnd

Environment

• Angular: 15.0.4
• CDK/Material: 15.0.3
• Browser(s): Edge, Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows

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