bug(mat-stepper): cdk-keyboard-focused class is not getting applied on stepper steps when navigating through keyboard arrow keys

[nehaGI]

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

No response

Description

let say have 3 steps in mat-stepper and focus is on first element and then i navigate through keyboard arrow key and focus moves to next step but cdk-keyboard-focused class do not get adds on this step(ideally since the navigating is being happened from keyboard arrow key so cdk-keyboard-focused class should get added on it)

Reproduction

Steps to reproduce:
1.
2.

Expected Behavior

Actual Behavior

Environment

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

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