Forward port AM/PM Style Settings

Change-Id: I952b363110765e10e694a98cc66857d7f2b3f1cd
Force clear cache on 'clear all'

Add long click to 'clear all' button in recents panel to force
clear caches, dentries and inodes

Change-Id: Iaa0ff526707be5b21bf746767f6241f4f0b6c39e

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java
Koush broke my cache!!!

Change-Id: Ia5796146de1b876772ea1ca487f43d3e933862da