Set correct accessibility delegate for the overview mode.
b/32004538

Change-Id: Ie68fe418b777784d747b004600ef1c98e96a4791
diff --git a/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java b/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java
index 350bc8a..0e1a708 100644
--- a/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java
+++ b/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java
@@ -143,6 +143,11 @@
     }
 
     @Override
+    public void setAccessibilityDelegate(AccessibilityDelegate delegate) {
+        mAllAppsHandle.setAccessibilityDelegate(delegate);
+    }
+
+    @Override
     protected void onDraw(Canvas canvas) {
         if (mTotalScroll == 0 || mNumPagesFloat == 0) {
             return;