🎨 Palette: Improve notification phrasing and extraction

[manupawickramasinghe]

💡 What: Replaced hardcoded, technical terminology (like "Kill" and "Click to open") and internal identifiers (like CHANNEL_ID as the channel name) with localized string resources in the foreground service notification.

🎯 Why: These elements are directly exposed to users in Android system settings and the notification shade. Using raw technical identifiers or aggressive terms degrades the user experience and breaks localization. This change ensures standard mobile UX phrasing ("Camera Service", "Stop", "Tap") is used universally.

📸 Before/After:

• Before: Notification channel named "REMOTE_CAM" with description "RemoteCam run". Notification title "RemoteCam (active)", text "Click to open", action button "Kill".
• After: Notification channel named "Camera Service" with description "Active remote camera stream". Notification title "RemoteCam (active)", text "Tap to open", action button "Stop" (all localized).

♿ Accessibility: By extracting these strings to strings.xml, they can now be properly localized for different languages and regions, ensuring all users can understand the notification context and actions. Standardized terminology ("Tap", "Stop") also provides clearer expectations for interaction compared to jargon ("Click", "Kill").

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PR created automatically by Jules for task 17224710657757917961 started by @manupawickramasinghe

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