tuna: use CM default overlays

This is CyanogenMod so we no longer need an ICS wallpaper,
PhaseBeam as default wallpaper and a short period of time
to screen off.

Change-Id: Ib5b53c93dbaa330252ffafd74ef74abec9570e91
Signed-off-by: Grarak <williye97@gmail.com>

Conflicts:
	overlay/frameworks/base/core/res/res/values/config.xml