Revert "Increase scroll thumb width"

This reverts commit 7b3ad21639.

app/src/main/java/androidx/recyclerview/widget/FastScrollerEx.java

@@ -526,7 +526,7 @@ public class FastScrollerEx extends RecyclerView.ItemDecoration implements Recyc
     @VisibleForTesting
     boolean isPointInsideVerticalThumb(float x, float y) {
         return (isLayoutRTL() ? x <= mVerticalThumbWidth
-            : x >= mRecyclerViewWidth - mVerticalThumbWidth * 5)
+            : x >= mRecyclerViewWidth - mVerticalThumbWidth * 3)
             && y >= mVerticalThumbCenterY - mVerticalThumbHeight / 2
             && y <= mVerticalThumbCenterY + mVerticalThumbHeight / 2;
     }