Previously, Messenger was `Start`ed multiple times, which resulted in
the shutdown process not being invoked on previously initialized
Messenger's sub-instances. This led to the failure of MVDS instance
shutdown causing massive error logs due to the attempts to read from a
closed database.
This PR fixes [9947](status-im/status-desktop#9947) and contains :
- Commit to fix the changing of custom picture and having the change
reflected on contact's side
- Commit to fix the deleting of picture and having the change reflected
on contact's side
- Rename confusing `ImageType` to `ImageFormat`
Patryk Osmaczko
Godfrain Jacques
Andrea Maria Piana
Omar Basem
Richard Ramos
John M. Ngei