Fix scheduled Note To Self messages delivering without notifications …

[terrancekhuang]

…or preview update

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• I have tested my contribution on these devices:

• Samsung Galaxy S25 Ultra (SM-S938U), Android 16 (One UI 8.5)

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Description

Fixes #13352

Fix 1: Conversation list preview not updated
IndividualSendJob and IndividualSendJobV2 called ThreadTable.updateSilently() after marking a scheduled message as sent. updateSilently skips notifyConversationListListeners(), so the UI never refreshes. Fixed by switching to ThreadTable.update().

Fix 2: No notification
Three layers of filtering combined to suppress the notification:

1. getMessagesForNotificationState only fetches messages with READ = 0. Outgoing messages (including Note To Self sends) are stored with READ = 1, so they are never queried.
2. NotificationMessage.isUnreadIncoming excludes all outgoing messages, so even if fetched they would be dropped from notification state.
3. NotificationFactory.shouldAlert() suppressed all notifications where authorRecipient.isSelf.

Fix: when ScheduledMessageManager fires a scheduled Note To Self message, it sets READ = 0 on that message via a new MessageTable.markAsUnread() helper. A new isNoteToSelfScheduled flag in NotificationStateProvider includes outgoing unread messages in Note To Self threads. shouldAlert() is updated to allow alerts for Note To Self conversations specifically (group conversations where you are the last sender remain unaffected). Finally, IndividualSendJob and IndividualSendJobV2 call MessageNotifier.updateNotification() after completing a Note To Self send to trigger the notification at the right moment.

Testing

1. Scheduled a message in Note To Self with the app in the background - notification fired correctly.
2. Scheduled a message and remained in the app in conversations list - conversation list preview updated immediately with an unread badge (no popup notification, which is expected foreground behavior).
3. Sent a regular (non-scheduled) Note To Self message - no notifications.