Fix switching running/cached apps with memory bar

Fixes upstream issue #38735
http://code.google.com/p/android/issues/detail?id=38735

Ported from CM10
http://review.cyanogenmod.org/25775

This patch is already submitted to AOSP. No feedback from them yet.
https://android-review.googlesource.com/45993

Change-Id: I484e30d3fd4f5425e174911ae22bb2def170e6b8
Add fastscroll to the Manage applications screen

so you don't need to scroll so much if you have alot of apps
and want to go to the bottom of the list.

Change-Id: I96d892abf53a9da784ae1df056558d4fd3cf64f6
Show application's package name in the "App info" screen.

Change-Id: I7dac8ffa0b10abb5ff235750e90a96d801b2f919