🎨 Palette: Add descriptive labels to STOP button

[manupawickramasinghe]

💡 What: Added android:contentDescription and android:tooltipText to the "STOP" button in the camera fragment.
🎯 Why: The visual label "STOP" is brief and may lack context. This provides a full explanation ("Stop camera server") for screen reader users and those hovering with a mouse/keyboard.
📸 Before/After: The button visually appears identical, but now has informative hover text and screen reader spoken context.
♿ Accessibility: Improves TalkBack experience by reading out the action's true outcome, and aids sighted users navigating via alternative inputs with a helpful tooltip.

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PR created automatically by Jules for task 8738874861720185800 started by @manupawickramasinghe

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[Copilot]

Pull request overview

This PR improves accessibility and discoverability in the camera UI by adding a descriptive label for the “STOP” action so screen readers and tooltips convey the full intent (“Stop camera server”) without changing the visual UI.

Changes:

• Added a new localized string (stop_button_desc) describing the STOP action.
• Applied android:contentDescription and android:tooltipText to the STOP button in fragment_camera.xml.
• Documented the accessibility guideline in .Jules/palette.md.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
app/src/main/res/values/strings.xml	Adds a new string resource used for accessibility/tooltip text on the STOP button.
app/src/main/res/layout/fragment_camera.xml	Sets content description and tooltip text for the STOP button to provide better context.
.Jules/palette.md	Records the accessibility learning/action for brief or destructive UI actions.

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