* refactor: Migrate home screen to data binding
* Add view binding
* Migrate ConversationView to view binding
* Migrate ConversationActivityV2 to view binding
* View model refactor
* Move more functionality to the view model
* Add ui state events flow
* Update conversation item bindings
* Update profile picture view bindings
* Replace Kotlin synthetics with view bindings
* Fix qr code fragment binding and optimize imports
* View binding refactors
* Make TextSecurePreferences an interface and add an implementation to improve testability
* Add conversation repository
* Migrate remaining TextSecurePreferences functions into the interface
* Add unit conversation unit tests
* Add unit test coverage for remaining view model functions
