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

Once screen is off it doesn't wakeup itself in active call, when
MO/MT call is disconnected from the other end. Now screen wakeup
is added when the MO/MTcall is disconnected.

Change-Id: I0b7390370f19f667302a4df11b45efaa32be330b
CRs-Fixed: 1051491