Use phone notification icon

[ComputelessComputer]

Adds the supplied Phone app icon as a bundled notification resource and uses it for iPhone call mic prompts.

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Note

Low Risk
Notification presentation only; no changes to mic detection, auto-stop, or session logic.

Overview
iPhone Call mic-detected notifications (AV Capture, avconferenced, TelephonyUtilities, etc.) now use a bundled PNG at notification-icons/phone.png instead of the macOS system symbol phone.fill.

The override in MIC_APP_NOTIFICATION_OVERRIDES switches from a static IPHONE_CALL_ICON to iconResource: "phone", matching how Zoom, Teams, and other platforms resolve icons through NOTIFICATION_ICON_RESOURCES and getNotificationResourceIcon. Tests expect type: "path" with /resources/notification-icons/phone.png for the main and footer icons.

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