Notify recents animation state for CommandQueue

This restores the callback that was missed for shell transition.

In legacy transition it was called from
 core: wm.RecentsAnimationController -> StatusBarManagerService
       -> binder call to sysui's CommandQueue.

Now with shell transition, RecentsTransitionHandler and CommandQueue
are in the same process by default, so just set the callback directly.

Then it can reach RotationButtonController#setRecentsAnimationRunning
to affect shouldOverrideUserLockPrefs that decides whether the locked
rotation should be reset when receiving natural rotation.

Fix: 300216165
Test: atest WMShellTest#initRecentTasks_registersListener
Test: Disable auto-rotation. Launch calculator in portrait.
      Rotate device to landscape and press rotation button.
      Use gesture navigation to switch to a portrait-only app.
      (RotationButtonController should reset locked rotation to 0)
      Switch to calculator, it should keep in portrait.
Change-Id: Id841d70bce0f1c8a41a17b2d7ba9163be77aad59