Disabling fast scroller when searching apps.

- There is no meaningful order for the app search results since they are ranked.

Bug: 23759082
Change-Id: I0aa4eea68136ea3ecef2a80b20ba7b0d46f0653b
diff --git a/src/com/android/launcher3/BaseRecyclerView.java b/src/com/android/launcher3/BaseRecyclerView.java
index f0d8b3b..9d713e3 100644
--- a/src/com/android/launcher3/BaseRecyclerView.java
+++ b/src/com/android/launcher3/BaseRecyclerView.java
@@ -268,6 +268,13 @@
     }
 
     /**
+     * Returns whether fast scrolling is supported in the current state.
+     */
+    protected boolean supportsFastScrolling() {
+        return true;
+    }
+
+    /**
      * Maps the touch (from 0..1) to the adapter position that should be visible.
      * <p>Override in each subclass of this base class.
      */