Finish recents animation on activity destroyed.

Do not remove acitivity lifecycle callback on reset.

Test: TaplTestsQuickstep.java testQuickSwitchFromApp
Fix: 228137694
Change-Id: I454db1d029af479624999f2e5736aea1a8a97b87

quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java

@@ -163,7 +163,11 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
                     if (mActivity != activity) {
                         return;
                     }
+                    if (mTaskAnimationManager != null) {
+                        mTaskAnimationManager.finishRunningRecentsAnimation(true);
+                    }
                     mRecentsView = null;
+                    mActivity.unregisterActivityLifecycleCallbacks(mLifecycleCallbacks);
                     mActivity = null;
                 }
             };
@@ -1571,9 +1575,6 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
 
     private void reset() {
         mStateCallback.setStateOnUiThread(STATE_HANDLER_INVALIDATED);
-        if (mActivity != null) {
-            mActivity.unregisterActivityLifecycleCallbacks(mLifecycleCallbacks);
-        }
     }
 
     /**