Reimplement expanded desktop on top of immersive mode.

Change-Id: I8ed08afebef0bb08a2694b1dbdd6dd1887b5b065
SystemUI: fix recents animation in expanded mode.

Change-Id: I63b83763933468c4f1953341aad4317d142e8bb4

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
PieService: back to CM.

Change-Id: I053737e36340a5ec6814b21eb87575f9689c7e88
PhoneWindowManager: add ability to use Pie service for system gestures.

Change-Id: Id4e2c0d82f771cd1c20e9196fb6db347494cca69
Keyguard: smooth background change.

Change-Id: Ia0e4d0000db72b5cdb6fede03791805e34fa311d
Show panels on lockscreen in expanded desktop mode.

Change-Id: Iaa2d712130707169c7a08156f8ea5afc247fc4cf
SystemUI: update internal state right after hiding transient bars.

Change-Id: Ibcdc45bbf1ce8561fae50f1e026552dbcbcc80ae
SystemUI: do not collapse panels if keyevent was canceled.

Change-Id: I9af82e9fa2305142521075938dfd05521adeb9f4
SystemUI: Fix missing top task in recent panel.

If preloadRecentTasksList was not called or was called too
late and RecentsActivty already started and last top activity has
excludeFromRecents flag setted it might be missing
from recent application list.

Change-Id: Idf7153824805ceea9fcaf04ac645b73a5e93a4d9