Settings: Wakelock Blocker (2/2)

p1: also added mContext member and png files.

Change-Id: I403479066a32aa65b6837c7f4eb784b9095bfa50

Conflicts:
	res/values/pac_strings.xml
	res/xml/pac_ui_settings.xml

Conflicts:
	res/xml/kangdroid_settings.xml

Conflicts:
	res/xml/kangdroid_settings.xml