add flag to let concurrent multiple infowindows to be shown

android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/InfoWindowActivity.java

@@ -35,6 +35,9 @@ public class InfoWindowActivity extends AppCompatActivity {
         mMapView.setAccessToken(ApiAccess.getToken(this));
         mMapView.onCreate(savedInstanceState);
 
+        // Enable to let concurrent multiple infowindows to be shown.
+        //mMapView.setAllowConcurrentMultipleOpenInfoWindows(true);
+
         mMapView.addMarker(new MarkerOptions()
                 .title("Intersection")
                 .snippet("H St NW with 15th St NW")

android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/InfoWindowAdapterActivity.java

@@ -64,6 +64,9 @@ public class InfoWindowAdapterActivity extends AppCompatActivity {
             }
         });
 
+        // Enable to let concurrent multiple infowindows to be shown.
+        //mMapView.setAllowConcurrentMultipleOpenInfoWindows(true);
+
         mMapView.addMarker(generateMarker("Andorra", 42.505777, 1.52529, "#F44336"));
         mMapView.addMarker(generateMarker("Luxembourg", 49.815273, 6.129583, "#3F51B5"));
         mMapView.addMarker(generateMarker("Monaco", 43.738418, 7.424616, "#673AB7"));