Updating the UI for focused state of an icon/folder.

issue: 16352129

Change-Id: If2e154dba06a0648f933f9aea38898642db9fd85
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index 79cac8f..3d6befa 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -159,6 +159,7 @@
                 allAppsButton.setOnTouchListener(mLauncher.getHapticFeedbackTouchListener());
                 mLauncher.setAllAppsButton(allAppsButton);
                 allAppsButton.setOnClickListener(mLauncher);
+                allAppsButton.setOnFocusChangeListener(mLauncher.mFocusHandler);
             }
 
             // Note: We do this to ensure that the hotseat is always laid out in the orientation of