Check LocationSettingsResponse success before processing (#1730)

First check if the `LocationSettingsResponse` task was successful before attempting to get the result.

Author: andannn

geolocator_android/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## NEXT
 
 - Fixes PlatformException in example app for Android 14 (API level 34) versions and newer by updating manifest permissions.
+- Prevented crash by checking `isSuccessful` before calling `getResult()` in location settings check.
 
 ## 5.0.1+1
 

geolocator_android/android/src/main/java/com/baseflow/geolocator/location/FusedLocationClient.java

@@ -167,17 +167,17 @@ public void isLocationServiceEnabled(LocationServiceListener listener) {
             (response) -> {
               if (!response.isSuccessful()) {
                 listener.onLocationServiceError(ErrorCodes.locationServicesDisabled);
-              }
-
-              LocationSettingsResponse lsr = response.getResult();
-              if (lsr != null) {
-                LocationSettingsStates settingsStates = lsr.getLocationSettingsStates();
-                boolean isGpsUsable = settingsStates != null && settingsStates.isGpsUsable();
-                boolean isNetworkUsable =
-                    settingsStates != null && settingsStates.isNetworkLocationUsable();
-                listener.onLocationServiceResult(isGpsUsable || isNetworkUsable);
               } else {
-                listener.onLocationServiceError(ErrorCodes.locationServicesDisabled);
+                LocationSettingsResponse lsr = response.getResult();
+                if (lsr != null) {
+                    LocationSettingsStates settingsStates = lsr.getLocationSettingsStates();
+                    boolean isGpsUsable = settingsStates != null && settingsStates.isGpsUsable();
+                    boolean isNetworkUsable =
+                            settingsStates != null && settingsStates.isNetworkLocationUsable();
+                    listener.onLocationServiceResult(isGpsUsable || isNetworkUsable);
+                } else {
+                    listener.onLocationServiceError(ErrorCodes.locationServicesDisabled);
+                }
               }
             });
   }