Make incoming call screen style configurable. (2/3)

Change-Id: I46db78c9b48fae52530b96789ec2721d51b7185a

Conflicts:
	src/com/android/incallui/InCallActivity.java
	src/com/android/incallui/MSimInCallActivity.java
InCallUI: Set Ticker to contact

Display contact/number/confrence
	in notification ticker.

PS2:
Implement Kufikugel's suggestion.
	Incoming call ticker only.

Change-Id: Ie89cceb67aecbf3dd15abd07dc35110f7fddc2f9