Add incoming call to background (non-intrusive InCall improvement)

Change-Id: Ic681eb85915f4fc4e150b6ead72a8794fd0b3410
fix build

Change-Id: I514517aa603282d451c9f0efdb49ae0a4fa4af10
InCallUI: Set Ticker to contact

Display contact/number/confrence
	in notification ticker.

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

Change-Id: Ie89cceb67aecbf3dd15abd07dc35110f7fddc2f9
InCallUI: do not use reflection

Change-Id: Ia36964777f07b8cd1498eaa87e60530b679fdd13