lib: tizen: thor screen update

lib: tizen: thor screen update

Now cable connection message is displayed on thor screen.
When cable is connected then only unneeded lcd console lines are overwritten.

Main changes:
- add new function: draw_thor_connected()
- update function draw_thor_screen()
- usb: gadget: thor:
  - move call to draw_thor_screen(),
  - add call to draw_thor_connected()

other change:
- remove draw_thor_init_screen() function

Change-Id: Ifc33f63eeb4822551fc78af1c6dd2a03044cab7e
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>