chore: Add region tags in MapsMarkerActivity. (googlemaps-samples#238)

Author: arriolac

tutorials/java/MapWithMarker/app/src/main/java/com/example/mapwithmarker/MapsMarkerActivity.java

@@ -58,14 +58,21 @@ protected void onCreate(Bundle savedInstanceState) {
      * installed Google Play services and returned to the app.
      */
     // [END_EXCLUDE]
+    // [START maps_marker_on_map_ready_add_marker]
     @Override
     public void onMapReady(GoogleMap googleMap) {
+        // [START_EXCLUDE silent]
         // Add a marker in Sydney, Australia,
         // and move the map's camera to the same location.
+        // [END_EXCLUDE]
         LatLng sydney = new LatLng(-33.852, 151.211);
-        googleMap.addMarker(new MarkerOptions().position(sydney)
-                .title("Marker in Sydney"));
+        googleMap.addMarker(new MarkerOptions()
+            .position(sydney)
+            .title("Marker in Sydney"));
+        // [START_EXCLUDE silent]
         googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
+        // [END_EXCLUDE]
     }
+    // [END maps_marker_on_map_ready_add_marker]
 }
 // [END maps_marker_on_map_ready]

tutorials/kotlin/MapWithMarker/app/src/main/java/com/example/mapwithmarker/MapsMarkerActivity.kt

@@ -47,6 +47,7 @@ class MapsMarkerActivity : AppCompatActivity(), OnMapReadyCallback {
     // [END maps_marker_get_map_async]
     // [END_EXCLUDE]
 
+    // [START maps_marker_on_map_ready_add_marker]
     override fun onMapReady(googleMap: GoogleMap?) {
         googleMap?.apply {
             val sydney = LatLng(-33.852, 151.211)
@@ -55,8 +56,11 @@ class MapsMarkerActivity : AppCompatActivity(), OnMapReadyCallback {
                     .position(sydney)
                     .title("Marker in Sydney")
             )
+            // [START_EXCLUDE silent]
             moveCamera(CameraUpdateFactory.newLatLng(sydney))
+            // [END_EXCLUDE]
         }
     }
+    // [END maps_marker_on_map_ready_add_marker]
 }
 // [END maps_marker_on_map_ready]