LocationSharingCoordinator: Handle live location sharing lab flag presentation.

RiotSwiftUI/Modules/Room/LocationSharing/LocationSharingViewModel.swift

@@ -138,7 +138,7 @@ class LocationSharingViewModel: LocationSharingViewModelType, LocationSharingVie
         }
     }
     
-    private func startLiveLocationSharing() {
+    private func checkLocationAuthorizationAndPresentTimerSelector() {
         
         self.locationSharingService.requestAuthorization { [weak self] authorizationStatus in
             
@@ -165,4 +165,17 @@ class LocationSharingViewModel: LocationSharingViewModelType, LocationSharingVie
             }
         }
     }
+    
+    private func startLiveLocationSharing() {
+        
+        guard let completion = completion else {
+            return
+        }
+        
+        completion(.showLabFlagPromotionIfNeeded({ liveLocationEnabled in
+            if liveLocationEnabled {
+                self.checkLocationAuthorizationAndPresentTimerSelector()
+            }
+        }))
+    }
 }