Delay initial contact sync

Signal/src/Loki/Settings/DeviceLinkingModal.swift

@@ -148,7 +148,9 @@ final class DeviceLinkingModal : Modal, DeviceLinkingSessionDelegate {
         LokiStorageAPI.addDeviceLink(signedDeviceLink).catch { error in
             print("[Loki] Failed to add device link due to error: \(error).")
         }
-        let _ = SSKEnvironment.shared.syncManager.syncAllContacts()
+        Timer.scheduledTimer(withTimeInterval: 8, repeats: false) { _ in
+            let _ = SSKEnvironment.shared.syncManager.syncAllContacts()
+        }
     }
     
     func handleDeviceLinkAuthorized(_ deviceLink: DeviceLink) {