app loading: boost boost hints

Change-Id: I56b49c61ccfa258880b7104470f9c2cdf4542184
remove some lag launching apps and improve scrolling

Change-Id: Ib10c11a1a3a798e57ddd31f550461b9ebd17bc38

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

Conflicts:

	core/java/android/widget/AbsListView.java