fb: do not block home button if incoming call is a background call
The user want to navigate ahead if it is a call in background.
So we allow it.

Change-Id: If40b8abba05b600191bfc1403f197e624fd7a360
(1/3) Contact details on incoming call
Change-Id: I9d4c8a78736ccbacb8a095109a7e7b7c8076621f
Signed-off-by: kecinzer <kecinzer@gmail.com>