Accessibility issues in segmented controls.

### Describe the bug

Screen Readers don't announce important information when SegmentedControls are used. They are
1. Position in set
2. SizeOfSet
3. IsSelected

### Regression

_No response_

### Reproducible in sample app?

- [ ] This bug can be reproduced in the sample app.

### Steps to reproduce

```text
1. Clone the devhome repo at www.github.com/microsoft/devhome
2. Click on "Maching Configuration" in the nav bar
3. Click on "Clone Repositories"
4. Click on "Add Repositories"
5. Tab on the segmented control.

Keep in mind I added the PositionInSet and SizeOfSet automation properties. Without these the screen reader is incorrect.
```

### Expected behavior

When tabbing over the account tab, the screen reader should say "Account, 1 of 2" When tabbing over the URL tab the screen reader should say "URL, 1 of 2, selected"

### Screenshots

_No response_

### Windows Build Number

- [ ] Windows 10 1809 (Build 17763)
- [ ] Windows 10 1903 (Build 18362)
- [ ] Windows 10 1909 (Build 18363)
- [ ] Windows 10 2004 (Build 19041)
- [ ] Windows 10 20H2 (Build 19042)
- [ ] Windows 10 21H1 (Build 19043)
- [X] Windows 11 21H2 (Build 22000)
- [ ] Other (specify)

### Other Windows Build number

_No response_

### App minimum and target SDK version

- [ ] Windows 10, version 1809 (Build 17763)
- [ ] Windows 10, version 1903 (Build 18362)
- [ ] Windows 10, version 1909 (Build 18363)
- [ ] Windows 10, version 2004 (Build 19041)
- [ ] Other (specify)

### Other SDK version

_No response_

### Visual Studio Version

_No response_

### Visual Studio Build Number

_No response_

### Device form factor

_No response_

### Nuget packages

_No response_

### Additional context

_No response_

### Help us help you

No.