Check if location tracking is started before starting it

vector/src/main/java/im/vector/app/features/location/LocationTracker.kt

@@ -66,6 +66,8 @@ class LocationTracker @Inject constructor(
     @VisibleForTesting
     var hasLocationFromGPSProvider = false
 
+    private var isStarted = false
+    private var isStarting = false
     private var firstLocationHandled = false
     private val _locations = MutableSharedFlow<Location>(replay = 1)
 
@@ -90,7 +92,8 @@ class LocationTracker @Inject constructor(
 
     @RequiresPermission(anyOf = [Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION])
     fun start() {
-        // TODO start only if not already started
+        if(!isStarting && !isStarted) {
+            isStarting = true
             Timber.d("start()")
 
             if (locationManager == null) {
@@ -129,6 +132,9 @@ class LocationTracker @Inject constructor(
                             notifyLocation(latestKnownLocation)
                         }
             }
+            isStarted = true
+            isStarting = false
+        }
     }
 
     /**
@@ -149,6 +155,8 @@ class LocationTracker @Inject constructor(
         callbacks.clear()
         hasLocationFromGPSProvider = false
         hasLocationFromFusedProvider = false
+        isStarting = false
+        isStarted = false
     }
 
     /**