harmattan: use chargingChanged as the notify signal for our battery critical state
harmattan: use chargingChanged as the notify signal for our battery critical state

mlehtima/cameraplus,mlehtima/cameraplus,foolab/cameraplus,mlehtima/cameraplus,foolab/cameraplus,foolab/cameraplus,alinelena/cameraplus,mer-hybris-kis3/cameraplus,mer-hybris-kis3/cameraplus,mer-hybris-kis3/cameraplus,alinelena/cameraplus,foolab/cameraplus,alinelena/cameraplus,mlehtima/cameraplus,alinelena/cameraplus,mer-hybris-kis3/cameraplus