Revert "Remove lag when launching an app"

This reverts commit 7f2101e5e104e8e92baf110c22250be8290bf6d7.
remove some lag launching apps and improve scrolling

Change-Id: Ib10c11a1a3a798e57ddd31f550461b9ebd17bc38

Conflicts:
	core/java/android/widget/AbsListView.java
Derp!