It’s just a thought, but you thought about using the circles built into the V2 cards .. It may seem strange, but it can satisfy your needs ...
, , , , , , . , , . :
CircleOptions circleOptions = new CircleOptions()
.center(new LatLng(37.4, -122.1))
.radius(10));
.fillColor(0x1AFF0000)
.strokeColor(Color.TRANSPARENT)
Circle circle = myMap.addCircle(circleOptions);
, , 20, , , , , , , for . , , , -! 