[TSAM-9543] ticker: do not set ticker transparent background

[TSAM-9543] ticker: do not set ticker transparent background

Use default indicator color as ticker background instead
of applaying transparency. The reason of this change are:

1. It solved rendering artifacts problems occuring then ticker is being
   shown, however underlaying window did not updated indicator image.
2. There might be cases in which application may try to display white
   content in top window area and in this case ticker content will
   not be visible to user.

Change-Id: Id13337a3ea6f8f9dd5437cf728ac0063460bce4c