Adding a new View class representing the scanned access-point list item.
It overrides the onDraw and draws the joystick and text showing the access point SSID.
The size of the joystick head in some way shows the signal level.
Simplified version of the access-point list item. Moved the content/rendering into the corresponding class.
Slightly improved the rendering, creating the instance of Paint only once.
Changed the way access-point items are kept and visualized.
Note: there is a bug resulting in item duplicatation. TBD...