Secure backup tweaks (#2277)

* Use a custom SDK build that might fix incomplete recovery state false positives. Enable chat backup by default

* Get rid of the chat backup feature flag

* Fix force unwrap warning

* Fix long line warning

* Prevent the recovery key confirmation banner popping up before the verification state is fetched. Stop showing secure backup user avatar and menu badges while the session is not verified.

* Switch back to the release version of the SDK

* Fix inconsistent session verification states, improve/simplify how to deal with it

* Fix unit tests

* Cleanup and hopefully simplify home screen banner presentations

ElementX/Sources/Services/Session/UserSession.swift

@@ -29,9 +29,16 @@ class UserSession: UserSessionProtocol {
     let clientProxy: ClientProxyProtocol
     let mediaProvider: MediaProviderProtocol
     let voiceMessageMediaManager: VoiceMessageMediaManagerProtocol
+    
     let callbacks = PassthroughSubject<UserSessionCallback, Never>()
+    
     private(set) var sessionVerificationController: SessionVerificationControllerProxyProtocol?
     
+    private var sessionVerificationStateSubject: CurrentValueSubject<Bool?, Never> = .init(nil)
+    var sessionVerificationState: CurrentValuePublisher<Bool?, Never> {
+        sessionVerificationStateSubject.asCurrentValuePublisher()
+    }
+    
     init(clientProxy: ClientProxyProtocol, mediaProvider: MediaProviderProtocol, voiceMessageMediaManager: VoiceMessageMediaManagerProtocol) {
         self.clientProxy = clientProxy
         self.mediaProvider = mediaProvider
@@ -64,16 +71,14 @@ class UserSession: UserSessionProtocol {
                 
                 tearDownSessionVerificationControllerWatchdog()
                 
-                if !isVerified {
-                    callbacks.send(.sessionVerificationNeeded)
-                }
-                
                 self.sessionVerificationController = sessionVerificationController
                 
+                sessionVerificationStateSubject.send(isVerified)
+                
                 sessionVerificationController.callbacks.sink { [weak self] callback in
                     switch callback {
                     case .finished:
-                        self?.callbacks.send(.didVerifySession)
+                        self?.sessionVerificationStateSubject.send(true)
                     default:
                         break
                     }