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
Some Tablet changes Part 1

Conflicts:
	packages/SystemUI/res/layout/status_bar_recent_panel.xml
	packages/SystemUI/res/layout/system_bar_notification_panel.xml
	packages/SystemUI/res/layout/system_bar_notification_panel_title.xml
	packages/SystemUI/res/layout/system_bar_recent_panel.xml
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java
drawables
drawables
More overhaul part 2

Conflicts:
	packages/SystemUI/res/layout/system_bar.xml
	packages/SystemUI/res/values/styles.xml
fix error