[Fluent V2] Fixes for Fluent Native Controls

[Dhruv-Mishra]

Problem

Fixed the Following Problems with Fluent Native Controls:

[Fluent Native controls] [Android] [V2 BottomSheet]: Name is not defined for the controls.
[Fluent Native controls] [Android] [V2 Menu] : After applying Resize, Text is not visible clearly.
[Fluent Native controls] [Android] [V2 Scaffold]: After applying Resize, Show Snackbar Button is not visible.

Screenshots

Before	After

Pull request checklist

This PR has considered:

• Light and Dark appearances
• Automated Tests
• Documentation and demo app examples
• VoiceOver and Keyboard Accessibility
• Internationalization and RTL layouts
• Size classes and window sizes (notched devices, multitasking, different window sizes, etc)

[Copilot]

Pull Request Overview

This PR addresses several UI and accessibility issues in Fluent Native Android V2 controls by adding semantic labels, updating layout defaults, and ensuring text visibility after resize.

• Updated ListContentBuilder to provide default tokens and accessibility content descriptions.
• Replaced Row with FlowRow in V2ScaffoldActivity under an experimental layout API.
• Standardized input widths and line limits in V2MenuActivity to keep text visible and avoid overflow.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
fluentui_listitem/src/main/java/com/microsoft/fluentui/tokenized/contentBuilder/ListContentBuilder.kt	Default token parameters made non-null and semantics added for accessibility.
FluentUI.Demo/src/main/java/com/microsoft/fluentuidemo/demos/V2ScaffoldActivity.kt	Swapped Row for FlowRow and added @OptIn(ExperimentalLayoutApi::class).
FluentUI.Demo/src/main/java/com/microsoft/fluentuidemo/demos/V2MenuActivity.kt	Introduced titleMaxLines and a fixed width fraction for input fields.

Comments suppressed due to low confidence (3)

fluentui_listitem/src/main/java/com/microsoft/fluentui/tokenized/contentBuilder/ListContentBuilder.kt:105

• Since the default value is always a new TabItemTokens() instance, consider making this parameter non-nullable (tabItemTokens: TabItemTokens = TabItemTokens()) to simplify the API and remove unnecessary nullability.

        tabItemTokens: TabItemTokens? = TabItemTokens()

fluentui_listitem/src/main/java/com/microsoft/fluentui/tokenized/contentBuilder/ListContentBuilder.kt:286

• The closing brace before the .semantics call looks misaligned and may end the wrong scope. Ensure that .semantics is chained directly on a Modifier instance, not on a lambda or block closure, to avoid syntax errors.

                                .semantics {

FluentUI.Demo/src/main/java/com/microsoft/fluentuidemo/demos/V2ScaffoldActivity.kt:175

• You switched from Row to FlowRow but haven't imported it. Add import androidx.compose.foundation.layout.FlowRow (and the correct experimental layout import) to avoid compilation errors.

            FlowRow(