Filter spam notifications

Change-Id: Ibf2377cd7491c7e0e9e9c9657e9e65eef1876ee3
Power menu reboot options

Credits:Vanir

Change-Id: Ic5fd03dc06c807a1199f8b9359e4eab8e3d9ecef

Conflicts:
	core/res/res/values/symbols.xml
SystemUI: Add double tap to sleep gesture

Change-Id: I4c54718e8ec8774677d13917b3a7ffa3b4b18cb5