Custom actions on navbar recents long press (2/2)

For now 7 actions are possible
1 - none
2 - last app
3 - screenshot
4 - kill app
5 - notifications panel
6 - QS panel
7 - power menu

Change-Id: I33d58911b8d60a6a3d1aa0f065c0654bf9874aeb

Conflicts:
	res/values/cr_arrays.xml
	res/values/cr_strings.xml