fix(iOS): removing polylines on iOS with googleProvider (react-native-maps#4973)

* fix: removing polylines on ios with googleProvider

* chore: code format

Author: mateki0

ios/AirGoogleMaps/AIRGoogleMapPolyline.h

@@ -19,6 +19,7 @@
 @property (nonatomic, strong) AIRGMSPolyline *polyline;
 @property (nonatomic, strong) NSArray<AIRMapCoordinate *> *coordinates;
 @property (nonatomic, copy) RCTBubblingEventBlock onPress;
+@property (nonatomic, strong) GMSMapView *originalMap;
 
 @property (nonatomic, strong) UIColor *strokeColor;
 @property (nonatomic, strong) NSArray<UIColor *> *strokeColors;

ios/AirGoogleMaps/AIRGoogleMapPolyline.m

@@ -29,11 +29,25 @@ -(void)setCoordinates:(NSArray<AIRMapCoordinate *> *)coordinates
   _coordinates = coordinates;
 
   GMSMutablePath *path = [GMSMutablePath path];
-  for(int i = 0; i < coordinates.count; i++)
+
+  if (!coordinates || coordinates.count == 0) 
   {
+    _polyline.map = nil; // Remove polyline from the map
+    return;
+  }
+
+  for (int i = 0; i < coordinates.count; i++) {
     [path addCoordinate:coordinates[i].coordinate];
   }
 
+  if (!_originalMap) {
+    _originalMap = _polyline.map; // Store the original map
+  }
+
+  if (!_polyline.map) {
+    _polyline.map = _originalMap;
+  }
+
   _polyline.path = path;
 
   [self configureStyleSpansIfNeeded];