Add "Turn WiFi off" action to "Open networks" notification

Forward ported to kitkat

Squashed:
add "Turn Wi-Fi off" action to the "open networks available" notification
add missing xhdpi turn wifi off image
WiFi open network notification: fix potential crash

Change-Id: I416a129388074c616892f6266af7005b4da1a521
Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>
Signed-off-by: anerik <anerikgames@gmail.com>

Conflicts:
	core/res/res/values/strings_custom.xml
	core/res/res/values/symbols_custom.xml
Merge branch 'kk4.4-caf' of https://github.com/Slimish/frameworks_base into kk4.4-caf