Dialer: Screen does not light when incominging call in screen standby

-Once screen is off it doesn't wakeup itself in ringing call when
 InCallActivity is in paused status. Now screen wakeup is added
 in InComingCall

Change-Id: I9fc213eaa8d1a46797b34a962bb58d7656f4773a
CRs-Fixed: 1078562