Flagged message don't appear in the flagged list

[Dougnkong]

Describe the bug
After message is flagged in the chat, it is appeared as flagged,
but the same message is not appeared in the flagged list.

To Reproduce
The problem always appear when message is flagged.

1. From the chat list
2. Go to one chat you need
3. Write a message and sends it
4. Press long the sent message
5. Tap Flag/Unflag
6. Go to profile
7. Tap Flagged messages icon
8. The list is blank

Expected behavior
The flagged message is suppose to appear in the flagged list

App information (please complete the following information):

• App version: Beta-7
• Plugin version: latest
• Delta Chat Core version: latest
• Flutter version: v1.17.0

Smartphone (please complete the following information):

• Device: android emulator-5554

[Boehrsi]

Due to the last clean up the MessageListBloc is missing. One should be made accessible and the FlaggedBloc should get deleted.