Update java doc for ExploreByTouchHelper, since it now supports heirarchies.

BUG: 35999299
Test: None

Change-Id: I3261bab0a97dd2af0dabcd40c407f520ee3f32be
diff --git a/core-ui/java/android/support/v4/widget/ExploreByTouchHelper.java b/core-ui/java/android/support/v4/widget/ExploreByTouchHelper.java
index 526575c..d30b0cf 100644
--- a/core-ui/java/android/support/v4/widget/ExploreByTouchHelper.java
+++ b/core-ui/java/android/support/v4/widget/ExploreByTouchHelper.java
@@ -49,8 +49,7 @@
  * support in custom {@link View}s that represent a collection of View-like
  * logical items. It extends {@link AccessibilityNodeProviderCompat} and
  * simplifies many aspects of providing information to accessibility services
- * and managing accessibility focus. This class does not currently support
- * hierarchies of logical items.
+ * and managing accessibility focus.
  * <p>
  * Clients should override abstract methods on this class and attach it to the
  * host view using {@link ViewCompat#setAccessibilityDelegate}: