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
HALO: keep apps in recents

Change-Id: If0aae965c2e088881abc0f00f5adb3ef9e1b228d