[Settings] A11y fixes

[niels9001]

Summary of the Pull Request

This PR fixes a couple of outstanding accessibility issues in Settings:
#13462, #13388 - Set IsTabStop="False" on ItemControls
#13451 - SettingsGroup header now get announced (added a custom AutomationPeer)
#13386 - Set IsTabStop="True" to multiple InfoBars
#13379 - Set AutomationProperties.Name to info button
#13374 - Set HeadingLevel to headings

Quality Checklist

• Linked issue: [Power Rename]: Focus is not visible after 'use Boost Library' Toggle button #13462, [General]: Focus goes to hidden controls after 'Give feedback' and 'Run at startup toggle' buttons. #13388, [Image Resizer]: 'Image Sizes', 'Encoding' and similar headings are not announced by Narrator when focus moves to the first interactive element under them as they are not associated #13451, [General]: Neither focus navigates to the info dialogue ( i ) below Administrator Mode heading nor screen reader announces the information present inside it. #13386, [Image Resizer]: Accessible name is not defined for 'I' icon button. #13379, [Genral]: General is not defined as a heading on the page. #13374
• Communication: I've discussed this with core contributors in the issue.
• Tests: Added/updated and all pass
• Installer: Added/updated and all pass
• Localization: All end user facing strings can be localized
• Docs: Added/ updated
• Binaries: Any new files are added to WXS / YML
  • No new binaries
  • YML for signing for new binaries
  • WXS for installer for new binaries

Contributor License Agreement (CLA)

A CLA must be signed. If not, go over here and sign the CLA.

[stefansjfw]

👍