NmeaClient: check ACCESS_FINE_LOCATION permission (#1540)

`locationManager.addNmeaListener()` requires the ACCESS_FINE_LOCATION
permission. With only reduced locations enabled this would cause an
exception.

Author: SebastianKeller

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

@@ -1,8 +1,10 @@
 package com.baseflow.geolocator.location;
 
+import android.Manifest;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.location.GnssStatus;
 import android.location.Location;
 import android.location.LocationManager;
@@ -73,9 +75,12 @@ public void start() {
 
     if (locationOptions != null) {
       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && locationManager != null) {
-        locationManager.addNmeaListener(nmeaMessageListener, null);
-        locationManager.registerGnssStatusCallback(gnssCallback, null);
-        listenerAdded = true;
+        if (context.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION)
+            == PackageManager.PERMISSION_GRANTED) {
+          locationManager.addNmeaListener(nmeaMessageListener, null);
+          locationManager.registerGnssStatusCallback(gnssCallback, null);
+          listenerAdded = true;
+        }
       }
     }
   }

geolocator_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: geolocator_android
 description: Geolocation plugin for Flutter. This plugin provides the Android implementation for the geolocator.
 repository: https://github.com/baseflow/flutter-geolocator/tree/main/geolocator_android
 issue_tracker: https://github.com/baseflow/flutter-geolocator/issues?q=is%3Aissue+is%3Aopen
-version: 4.6.0
+version: 4.6.1
 
 environment:
   sdk: ">=2.15.0 <4.0.0"