Polyline function added

Frontend/look_ai/lib/main.dart

@@ -51,6 +51,16 @@ class MapSampleState extends State<MapSample> {
     position: LatLng(37.43296265331129, -122.08832357078792),
   );
 
+  static final Polyline _kPolyline = Polyline(
+    polylineId: PolylineId('_kPolyline'),
+    points:[
+      LatLng(37.42796133580664, -122.085749655962),
+      LatLng(37.43296265331129, -122.08832357078792),
+    ],
+    width: 5,
+  );
+
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -59,6 +69,9 @@ class MapSampleState extends State<MapSample> {
         markers: {_kGooglePlexMarker,
           _kLakeMarker,
         },
+        polylines:{
+          _kPolyline,
+        },
         initialCameraPosition: _kGooglePlex,
         onMapCreated: (GoogleMapController controller) {
           _controller.complete(controller);