Catch SecurityException when setting stream volume to avoid DND crash

[Copilot]

On Nothing Phone 3 (Nothing OS 4.1 / Android 16 API 36), calling AudioManager.setStreamVolume() on the Ring stream while muted throws SecurityException: Not allowed to change Do Not Disturb state, crashing the app.

Changes

• StreamVolumeSlider.kt: Wrap audioManager.setStreamVolume() in a try-catch for SecurityException; on failure, return early without invoking onChange so the UI stays consistent and the app survives gracefully.

volume = target
try {
    audioManager.setStreamVolume(streamType, target, 0)
} catch (_: SecurityException) {
    return@TrackSlider
}
onChange?.invoke()

• Fixes [Nothing Phone 3] [Nothing OS 4.1] Mute Crash #68