Final fix for recent apps orientation

Besides the known showImpl (called every single time when recent apps is shown or hidden), Override onSizeChanged method for setting recent hints on orientation changes, and restore hints in onUiHidden method. The perfect match

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsActivity.java
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java

Change-Id: Ieb9ccd076223d08df6e41ac62641f302d6708595