Fix spring not springing when unstashing.

The spring animation was getting cancelled by the reset
animation.

Added a check to avoid creating a new reset animation if we
are already animating to the final value.

Bug: 273961611
Change-Id: I3afb62b89b5f6fbe920906499db2497ef8e94069
Flag: ENABLE_TRANSIENT_TASKBAR
Test: stash transient taskbar

quickstep/src/com/android/launcher3/taskbar/TaskbarTranslationController.java

@@ -133,6 +133,21 @@ public class TaskbarTranslationController implements TaskbarControllers.Loggable
         return mCallback;
     }
 
+    /**
+     * Returns true if we will animate to zero before the input duration.
+     */
+    public boolean willAnimateToZeroBefore(long duration) {
+        if (mSpringBounce != null && mSpringBounce.isRunning()) {
+            long springDuration = mSpringBounce.getDuration();
+            long current = mSpringBounce.getCurrentPlayTime();
+            return (springDuration - current < duration);
+        }
+        if (mTranslationYForSwipe.isAnimatingToValue(0)) {
+            return mTranslationYForSwipe.getRemainingTime() < duration;
+        }
+        return false;
+    }
+
     /**
      * Returns an animation to reset the taskbar translation to {@code 0}.
      */