Enable e2ee support (#274)

* Enable sliding sync common extensions and session verification banner display; fix user session flow coordinator state machine
* Fixed a couple of deprecation warnings
* Add missing `m.room.encryption` required state
* Switch to rust-sdk v1.0.15-alpha and add changelog

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -84,14 +84,15 @@ class ClientProxy: ClientProxyProtocol {
             
             let slidingSyncView = try SlidingSyncViewBuilder()
                 .timelineLimit(limit: 10)
-                .requiredState(requiredState: [RequiredState(key: "m.room.avatar", value: "")])
+                .requiredState(requiredState: [RequiredState(key: "m.room.avatar", value: ""),
+                                               RequiredState(key: "m.room.encryption", value: "")])
                 .name(name: "HomeScreenView")
                 .syncMode(mode: .fullSync)
                 .build()
             
             slidingSync = try slidingSyncBuilder
                 .addView(view: slidingSyncView)
-//                .withCommonExtensions()
+                .withCommonExtensions()
                 .build()
             
             roomSummaryProvider = RoomSummaryProvider(slidingSyncController: slidingSync,
@@ -254,6 +255,6 @@ class ClientProxy: ClientProxyProtocol {
     fileprivate func didReceiveSlidingSyncUpdate(summary: UpdateSummary) {
         roomSummaryProvider.updateRoomsWithIdentifiers(summary.rooms)
         
-//        callbacks.send(.receivedSyncUpdate)
+        callbacks.send(.receivedSyncUpdate)
     }
 }

ElementX/Sources/UserSession/UserSessionFlowCoordinator.swift

@@ -112,7 +112,7 @@ class UserSessionFlowCoordinator: Coordinator {
             case .presentRoom(let roomIdentifier):
                 self.stateMachine.processEvent(.showRoomScreen(roomId: roomIdentifier))
             case .presentSettings:
-                self.presentSettingsScreen()
+                self.stateMachine.processEvent(.showSettingsScreen)
             case .presentBugReport:
                 self.presentBugReportScreen()
             case .verifySession:
@@ -209,6 +209,8 @@ class UserSessionFlowCoordinator: Coordinator {
 
         navigationRouter.dismissModule()
         remove(childCoordinator: coordinator)
+        
+        stateMachine.processEvent(.dismissedSettingsScreen)
     }
     
     // MARK: Session verification

ElementX/Sources/UserSession/UserSessionFlowCoordinatorStateMachine.swift

@@ -89,6 +89,14 @@ class UserSessionFlowCoordinatorStateMachine {
                 return .suspended
             case (.becomeActive, .suspended):
                 return self.stateBeforeSuspension
+            case (.showSettingsScreen, .homeScreen):
+                return .settingsScreen
+            case (.dismissedSettingsScreen, .settingsScreen):
+                return .homeScreen
+            case (.showSessionVerificationScreen, .homeScreen):
+                return .sessionVerificationScreen
+            case (.dismissedSessionVerificationScreen, .sessionVerificationScreen):
+                return .homeScreen
             default:
                 return nil
             }