Fix unintended scroll in all apps when using external mouse.

The reason is because when ag/29152694 was introduced, the accessibilityEvent that would
trigger is TYPE_VIEW_HOVER_ENTER that would eventually always have the list scrolling depending
on where the mouse would be. Gating it to TYPE_VIEW_ACCESSIBILITY_FOCUSED would be fix this as
this should still work for talkback when traversing the A-Z list as TYPE_VIEW_ACCESSIBILITY_FOCUSED is whats is always used
during this case.

bug: 372965379
Test: manually
Flag: EXEMPT bug fix
Change-Id: I249cee8036216f93aab53efc3d77fad047f7e408

quickstep/src/com/android/launcher3/QuickstepAccessibilityDelegate.java

@@ -15,6 +15,8 @@
  */
 package com.android.launcher3;
 
+import static android.view.accessibility.AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED;
+
 import static androidx.recyclerview.widget.RecyclerView.NO_POSITION;
 
 import android.view.KeyEvent;
@@ -48,7 +50,11 @@ public class QuickstepAccessibilityDelegate extends LauncherAccessibilityDelegat
     public void onPopulateAccessibilityEvent(View view, AccessibilityEvent event) {
         super.onPopulateAccessibilityEvent(view, event);
         // Scroll to the position if focused view in main allapps list and not completely visible.
-        scrollToPositionIfNeeded(view);
+        // Gate based on TYPE_VIEW_ACCESSIBILITY_FOCUSED for unintended scrolling with external
+        // mouse.
+        if (event.getEventType() == TYPE_VIEW_ACCESSIBILITY_FOCUSED) {
+            scrollToPositionIfNeeded(view);
+        }
     }
 
     private void scrollToPositionIfNeeded(View view) {