Cancel selection animation when new selection arrives

The onAnimationEnd callback will set the selection but there is a race
condition that the new selection may arrive during animation.
The later selection should be honored, so cancel the ongoing animation
before starting new selection.

Bug: 244273440
Test: Manually done on the Pixel 5 with wireless mouse
Change-Id: I977f6cc9244e571caddfe0d79e10ee1c6c8a413d

core/java/android/widget/SelectionActionModeHelper.java

@@ -148,6 +148,9 @@ public final class SelectionActionModeHelper {
             startSelectionActionMode(null);
         } else {
             resetTextClassificationHelper();
+            if (mSmartSelectSprite != null && mSmartSelectSprite.isAnimationActive()) {
+                mSmartSelectSprite.cancelAnimation();
+            }
             mTextClassificationAsyncTask = new TextClassificationAsyncTask(
                     mTextView,
                     mTextClassificationHelper.getTimeoutDuration(),