Add recents ram bar, (2/2):

Ported from Slimroms:

recents ram bar:

https://github.com/SlimRoms/frameworks_base/commit/90441dd038dfdeff6cd28a1e251faa84e1c7728d
https://github.com/SlimRoms/frameworks_base/commit/1120f72d469e582730e16f9a21016ce5c618b5b6
https://github.com/SlimRoms/frameworks_base/commit/7da4083e3acc479bed1aaa807df88cd0c60aa602
https://github.com/SlimRoms/frameworks_base/commit/eef73ab26de18e939c557305a0b6ed1eaab1e4a1

Force clear cache on 'clear all':

https://github.com/SlimRoms/frameworks_base/commit/8daa8d476cf66ac51c74b92320cba55475e1774d

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/res/layout-land/status_bar_recent_panel.xml
	packages/SystemUI/res/layout/status_bar_recent_panel.xml

Change-Id: I579ea1f0c760247d0a8efc148f34f2fda3452c4c