Launcher: increasing the lower bound and upperbound of loaded pages to avoid stutter in applist scroll

Change-Id: I8fed59569129cc1c062ffdb287183531c1f84dbf
(cherry picked from commit 02a74f1f847289bcb24236988283e51e876af1e7)
Revert "EXPERIMENTAL: 	Use less HW layers in All Apps"

This reverts commit 265a3e0d3890093f3fc48ebe5b18354841419db4.

Conflicts:
	src/com/cyanogenmod/trebuchet/AppsCustomizePagedView.java

Change-Id: I2ecd2834ea6dde03ba13e56a2b0e50207bdf406a