[android] - prevent null pointer when receiving connectivity change events while destroying the underlying map (#6858)

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java

@@ -2552,7 +2552,7 @@ public class MapView extends FrameLayout {
         // Called when an action we are listening to in the manifest has been sent
         @Override
         public void onReceive(Context context, Intent intent) {
-            if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
+            if (!destroyed && intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
                 boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
                 onConnectivityChanged(!noConnectivity);
             }