Set contentDescription on caret

Change-Id: I1f66b96b3f94649d85857b0107144bb4070ef448
diff --git a/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java b/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java
index ca3a2dd..350bc8a 100644
--- a/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java
+++ b/src/com/android/launcher3/pageindicators/PageIndicatorLineCaret.java
@@ -159,6 +159,11 @@
     }
 
     @Override
+    public void setContentDescription(CharSequence contentDescription) {
+        mAllAppsHandle.setContentDescription(contentDescription);
+    }
+
+    @Override
     public void setScroll(int currentScroll, int totalScroll) {
         if (getAlpha() == 0) {
             return;