fix(settings): tidy spacing, uniform Android row heights & toggle layout

- spacing: top padding + inter-group gaps so section titles, descriptions
  and buttons no longer touch (playback buffer, audio/subtitles, music,
  marlin, kefin, streamystats, storage, hide-libraries)
- ListGroup: skip empty section titles
- SettingSwitch: cap the native Android switch in a fixed centered box so
  toggle rows match the other rows and stay put when toggled; iOS unchanged
- Appearance: move "Hide libraries" to the end of the list

components/settings/StorageSettings.tsx

@@ -125,7 +125,7 @@ export const StorageSettings = () => {
         </View>
       </View>
       {!Platform.isTV && (
-        <ListGroup>
+        <ListGroup className={Platform.OS === "android" ? "mt-4" : undefined}>
           <ListItem
             textColor='red'
             onPress={onDeleteClicked}