frameworks: add keyguard wallpaper functionality to WallpaperManager

Adapted for cm-12.

Change-Id: I0eb1b5578b705c2ade4c0772fa86e09478b9f73e
Signed-off-by: Roman Birg <roman@cyngn.com>
(cherry picked from commit 1f77af99a4911aec2c162233f95aa868e1218fbe)
Add turn off action to WiFi Tether notification

PS 2+3 : Fixed Icon + Add persistence to WiFi state [mnazim]

Adapted to LP.

Change-Id: I320405ed7e90e4c06ecdb127cd4c1cad6bedbcdd
Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>
(cherry picked from commit 5a29898a0a6b87dd11aa965203310a77db871374)