Replace the ServiceLocator with direct dependency injection (#5548)

Removes the ServiceLocator singleton and instead directly injects the dependencies it was holding for more control over instantiation of the various component subtrees and better visibility over how they're being used.

UnitTests/Sources/RoomFlowCoordinatorTests.swift

@@ -18,7 +18,13 @@ final class RoomFlowCoordinatorTests {
     var roomFlowCoordinator: RoomFlowCoordinator!
     var navigationStackCoordinator: NavigationStackCoordinator!
     var cancellables = Set<AnyCancellable>()
-    
+
+    private let appSettings: AppSettings
+
+    init() {
+        appSettings = AppSettings()
+    }
+
     deinit {
         AppSettings.resetAllSettings()
     }
@@ -236,7 +242,7 @@ final class RoomFlowCoordinatorTests {
     
     @Test
     func threadedEventRoutes() async throws {
-        ServiceLocator.shared.settings.threadsEnabled = true
+        appSettings.threadsEnabled = true
         setupRoomFlowCoordinator()
         
         // Navigate directly to the threaded event
@@ -479,13 +485,13 @@ final class RoomFlowCoordinatorTests {
                                                   bugReportService: BugReportServiceMock(.init()),
                                                   elementCallService: ElementCallServiceMock(.init()),
                                                   timelineControllerFactory: timelineControllerFactory,
-                                                  emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                                  emojiProvider: EmojiProvider(appSettings: appSettings),
                                                   linkMetadataProvider: LinkMetadataProvider(),
                                                   appMediator: AppMediatorMock.default,
-                                                  appSettings: ServiceLocator.shared.settings,
+                                                  appSettings: appSettings,
                                                   appHooks: AppHooks(),
-                                                  analytics: ServiceLocator.shared.analytics,
-                                                  userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                                  analytics: .mock(settings: appSettings),
+                                                  userIndicatorController: UserIndicatorControllerMock.default,
                                                   notificationManager: NotificationManagerMock(),
                                                   stateMachineFactory: StateMachineFactory())