Add new assets for LMP preview

issue 15544569 c), d), e)

Change-Id: Ib352ef1fa7c19c3695c82f3ea31936a4b41da5aa
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index 2ac2f00..4b25433 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -150,6 +150,11 @@
             TextView allAppsButton = (TextView)
                     inflater.inflate(R.layout.all_apps_button, mContent, false);
             Drawable d = context.getResources().getDrawable(R.drawable.all_apps_button_icon);
+
+            if (Utilities.isLmp()) {
+                d = context.getResources().getDrawable(R.drawable.all_apps_button_icon_l);
+            }
+
             Utilities.resizeIconDrawable(d);
             allAppsButton.setCompoundDrawables(null, d, null, null);