[app-data] Fix notification counter database logic to assure updates are persisted

[wax911]

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Description of Bug

Notification counter in the navigation drawer never seems to get updated despite API response data reflecting changes, unless you logout and login again.

Reproduction Steps

• Login to your AniList account and make a mental note of what the unread notification count is
• Interact with the app or website to get the notification count to increase
• Check the app and make sure that at least one notification check/profile request has been made
• See the notification count upon expanding the navigation drawer, notice that the unread amount doesn't change

Screenshots

Additional Context

• See notification provider for UI controller for icon and counter logic
• See data source class responsible for managing requests and persistence of the viewer class
• See notification entity reference table that holds the user_id and notification count for a given user_id, this is only applicable to the authenticated accounts/profiles

We utilise relations to combine the user and notification entity tables https://github.com/AniTrend/anitrend-v2/blob/bf2d52ddfc4d0523d4127230317c02a15f92e53f/app-data/src/main/kotlin/co/anitrend/data/user/entity/view/UserEntityView.kt#L42-L49

[wax911]

Perhaps it's easier to use a simple shared prefs to store our notification unread count, that way we don't need to concern our selfs with complex database queries