Fix hardware keys mess (2/2)

Squashed commits from CM

Updates Hardware keys settings

Settings: Forward port Kill app back long press
Original author: DaneshM

Change-Id: Ide8be24d679d0b3d74bf56b33696dc279de49470

Adds ability to answer call with hardware HOME button (preparation to winter time)

Change-Id: I0d22a6fbb92a61f08b50cae5c14d0030b81ee6ec

Change-Id: If77ee56defce6e4f796520d4f3b3a0f251bcf194