RadialGauge: Changing value does not announce changes to Narrator

[marcelwgn]

Describe the bug

A clear and concise description of what the bug is.

When using arrow keys to change the value of a RadialGauge control, the narrator is not being updated on the new value.

• Is this bug a regression in the toolkit? If so, what toolkit version did you last see it work:

Steps to Reproduce

• Can this be reproduced in the Sample App? (Either in a sample as-is or with new XAML pasted in the editor.) If so, please provide custom XAML or steps to reproduce. If not, let us know why it can't be reproduced (e.g. more complex setup, environment, dependencies, etc...)

Steps to reproduce the behavior:

1. Assuming app does not crash on pressing a key while having a RadialGauge focused with narrator
2. Press a key and observe value changed
3. Notice the lack of value change being announced

Expected behavior

A clear and concise description of what you expected to happen.
New value should be announced.

Screenshots

If applicable, add screenshots to help explain your problem.

Environment

NuGet Package(s): 

Package Version(s): 

Windows 10 Build Number:
- [ ] Fall Creators Update (16299)
- [ ] April 2018 Update (17134)
- [ ] October 2018 Update (17763)
- [ ] May 2019 Update (18362)
- [ ] May 2020 Update (19041)
- [x] Insider Build (build number: 20236)

App min and target version:
- [ ] Fall Creators Update (16299)
- [ ] April 2018 Update (17134)
- [ ] October 2018 Update (17763)
- [ ] May 2019 Update (18362)
- [ ] May 2020 Update (19041)
- [ ] Insider Build (xxxxx)

Device form factor:
- [x] Desktop
- [ ] Xbox
- [ ] Surface Hub
- [ ] IoT

Visual Studio 
- [ ] 2017 (version: )
- [ ] 2019 (version: ) 
- [ ] 2019 Preview (version: )

Additional context

Add any other context about the problem here.
If it's fine I would add it to my batch PR that updates UIA of RadialGauge and RangeSelector.

[ghost]

Hello chingucoding, thank you for opening an issue with us!

I have automatically added a "needs triage" label to help get things started. Our team will analyze and investigate the issue, and escalate it to the relevant team if possible. Other community members may also look into the issue and provide feedback 🙌

[Kyaa-dost]

@chingucoding Is this also related to #3539 #3537?

[Kyaa-dost]

@chingucoding also do you want me to assign these issues to you since you mentioned you will be working on them?

[marcelwgn]

No, this is a separate bug as the RadialGauge automationpeer does not handle value changes.

Yes, sure feel free to assign the issues to me.

[Kyaa-dost]

@chingucoding Thanks for the clarification and it makes sense ❤️