Updated assets for QSB launch and added a custom transition animation.

Using a fade animation for launching QSB because the standard intra-wallpaper transition
has changed.

Bug: 3223441
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index 55a6176..232fef4 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -1923,6 +1923,8 @@
      */
     public void onClickSearchButton(View v) {
         startSearch(null, false, null, true);
+        // Use a custom animation for launching search
+        overridePendingTransition(R.anim.fade_in_fast, R.anim.fade_out_fast);
     }
 
     /**