Update orientation state while gesture animation start.

While quickswitch in landscape mode, the orientation handler would be
update to LandscapePagedViewHandler when receive onLauncherStart,
however, it might be too late because the VelocityTracker can already
tracking with PortraitPagedViewHandler at
AbsSwipeUpHandler#setupRecentsViewUi, which leads the wrong
judgement while PagedView#onTouchEvent handling the ACTION_UP that
the velocity can nearly 0 from mOrientationHandler.getPrimaryVelocity.

By update the orientation handler earlier at onGestureAnimationStart,
the velocity tracking result should stay consistent from ACTION_DOWN
till ACTION_UP.

Bug: 213867585
Bug: 209936664
Bug: 221805258
Test: run below tests w/o shell transition.
atest FlickerTests:QuickSwitchBetweenTwoAppsForwardTest
atest FlickerTests:QuickSwitchBetweenTwoAppsBackTest

Change-Id: If73fa8d88cc372b6f783fb6cdda4148d11a2ee19