[Fabric] Implement IRangeValueProvider and Adjust IValueProvider Implementation

[chiaramooney]

Description

Type of Change

• New feature (non-breaking change which adds functionality)

Why

Implement IRangeValueProvider so developers can create custom controls which pass range data to UIA. Adjusted IValueProvider implementation. Now that IRangeValueProvider is supported, IValueProvider should not cover numerical data anymore.

Resolves #13351
Resolves #13328
Resolves #12510
#11905

What

• Add support for IRangeValueProvider: Provider is implemented when a control has accessibilityValue={{min: X, max: Y, and now: Z}}
• IValueProvider implemented if control is TextInput or if accessibilityValue={{text: X}}
• accessibilityValue={{now: x}} -> RangeValueProvider.Value
• accessibilityValue={{min: y}} -> RangeValueProvider.Minimum
• accessibilityValue={{now: z}} -> RangeValueProvider.Maximum
• accessibilityValue={{text: x}} -> ValueProvider.Value
• If control is a TextInput, ValueProvider.Value = contents of TextInput
• Added support for aria-readonly and accessibilityState={{readOnly: X}}
• aria-readonly or accessibilityState={{readOnly: X}} -> RangeValueProvider.IsReadOnly (If RangeValueProvider implemented) or ValueProvider.IsReadOnly (if ValueProvider implemented), default to false

Note: UIA SetValue still cannot be implemented because of API restrictions with the onAccessibilityAction API. Issue has been filed upstream (See #)

Testing

Add a couple automated tests. Tested additional scenarios locally.

Changelog

Should this change be included in the release notes: Yes

Adds support for custom controls to pass range data to UIA via the IRangeValueProvider. Added support for aria-readonly and accessibilityState.readOnly

Microsoft Reviewers: Open in CodeFlow