[HACK] Migrate NotificationSettingsScreen to Material 3

[kidinov]

Description

Migrates the NotificationSettingsScreen from Material 2 to Material 3 components and theming.

Changes

• Updated imports from androidx.compose.material to androidx.compose.material3
• Changed MaterialTheme.colors to MaterialTheme.colorScheme
• Updated typography references:
  • MaterialTheme.typography.subtitle1 → MaterialTheme.typography.titleMedium
  • MaterialTheme.typography.body2 → MaterialTheme.typography.bodyMedium

Steps to reproduce

1. Open the app and navigate to Settings → Notifications
2. To see the "Enable cha-ching sound" option, first change the notification sound:
   • Go to device Settings → Apps → WooCommerce → Notifications
   • Find "New order" notification channel and change its sound to something other than default
   • Return to the app settings to see the option appear

Before

After

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	fe64e17
	Direct Download	woocommerce-wear-prototype-build-pr14628-fe64e17.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	fe64e17
	Direct Download	woocommerce-prototype-build-pr14628-fe64e17.apk

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.45%. Comparing base (04e1fe1) to head (fe64e17).
⚠️ Report is 30 commits behind head on trunk.

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk   #14628      +/-   ##
============================================
- Coverage     38.45%   38.45%   -0.01%     
+ Complexity     9753     9752       -1     
============================================
  Files          2061     2061              
  Lines        115385   115385              
  Branches      15360    15360              
============================================
- Hits          44373    44372       -1     
  Misses        66898    66898              
- Partials       4114     4115       +1     

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[samiuelson]

LGTM!